Mjh Bears Science 7Th Grade 2Nd Semester Exam Review

Front 1

hurricane

Back 1

a tropical cyclone with winds of 74 miles (119 kilometers) per hour or greater that occurs especially in the western Atlantic, that is usually accompanied by rain, thunder, and lightning, and that sometimes moves into temperate latitudes

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drought

Back 2

lack of rain for a long period of time

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earthquake

Back 3

a shaking or trembling of the earth that is volcanic or tectonic in origin

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tsunami

Back 4

series of ocean waves generated by earthquakes , landslides, or volcanic activity in the sea floor

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tornado

Back 5

a violently rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud

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flood

Back 6

an overflow of water from thunderstorms, hurricane storm surges or melting snow that submerges land which is usually dry caused by too much rain

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volcano

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a mountain with a hole in the top or side that sometimes sends out rocks, ash, lava, etc., in a sudden explosion (called an eruption)

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delta

Back 8

where the river deposits sediments as it reaches the Gulf

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Sun

Back 9

life on Earth depends on energy from where

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Ozone Layer

Back 10

What shields the Earth from ultra violet radiation?

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Eukaryote

Back 11

a cell that has a true nucleus

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Desert

Back 12

What type of habitat is an organism that stores large quantities of water internally most likely to live in?

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Endocrine System

Back 13

chemically controls the various functions of cells, tissues, and organs through the secretion of hormones. Includes the adrenal glands, parathyroid gland, pituitary gland, and thyroid gland, as well as the ovaries, pancreas, and testes.

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Nervous System

Back 14

the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia.

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Muscular System

Back 15

composed of muscle cells and tissues that brings about movement of an organ or body part

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Skeletal System

Back 16

framework of the body, consisting of bones and other connective tissues, which protects and supports the body tissues and internal organs

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Cell

Back 17

smallest unit of life that makes up all living things

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Tissue

Back 18

collection of cells with similar functions

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organs

Back 19

a grouping of tissues into a distinct structure that performs a specific function

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nucleus

Back 20

found of center of cell and contains genetic material

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cell membrane

Back 21

regulates transfer of material in and out of cell

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chloroplasts

Back 22

where photosynthesis takes place in a plant cell

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vacuoles

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store water, waste and nutrients for cell

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cytoplasm

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clear jelly

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mitochondria

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an organelle in the cytoplasm of cells that functions is energy production

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ribosome

Back 26

build protein for the cell

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lysosome

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holds enzymes that are made in the cell; location of digestion within the cell

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Golgi body

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gathers simple molecules and combines them into more complex molecules; builds lysosomes

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Genetics

Back 29

the transfer of inherited traits from parents to offspring

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heredity

Back 30

the traits that offspring inherit from parents

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excretory system

Back 31

the system of organs that regulates the amount of water in the body and filters and eliminates from the blood the wastes produced by metabolism. The principal organs are the kidneys, ureters, urethra, and urinary bladder.

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circulatory system

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the system of organs and tissues, including the heart, blood, blood vessels, lymph, lymphatic vessels, and lymph glands, involved in circulating blood and lymph through the body

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reproductive system

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produces offspring

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digestive system

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breaks down food to be absorbed in the bloodstream

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respiratory system

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the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide takes place

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organism

Back 36

collection of organ systems that make up a living thing

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cell wall

Back 37

controls pressure in cell

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prokaryote

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NO nucleus

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archaebacteria

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can live in extreme conditions

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camouflage

Back 40

What adaptation helps protect animals against their predators because their body color matches surroundings and makes it harder to see?

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lungs

Back 41

Which internal structure is an adaptation that provided organisms with the function to perform gas exchange on land?

Front 42

wild fire

Back 42

any large fire that spreads rapidly and is hard to extinguish caused by humans or lightning striking in a dry area

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proximity to the Sun

Back 43

What is the most important factor that determines Earth's temperatures?

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asexual reproduction

Back 44

reproductive process that involves one parent and produces offspring identical to the parent

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sexual reproduction

Back 45

reproductive process involving two parents whose genetic material is combined to produce a new organism different from themselves

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direction of prevailing winds

Back 46

What is the source of the distinct shapes and features of sand dunes in a desert?

Front 47

wave action and currents

Back 47

What process is responsible for creating sand bars?

Front 48

Magnetosphere

Back 48

What protects living organisms on Earth from the harmful effects of solar wind?

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weeds

Back 49

What is the first thing that will grow after a wildfire?

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space is airless

Back 50

Why do space stations require an oxygen system?

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special handles

Back 51

What helps astronauts move from one area to another inside a spaceship?

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no

Back 52

IS the rate at which species produce offspring effected by ecological succession?

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binary fission

Back 53

What is the asexual process that prokaryotes use to reproduce?

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sandbars

Back 54

What will form off shore as a possible effect of severe beach erosion?

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canyons

Back 55

What do rivers carrying sediments that erode land form?

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multilayered space suits

Back 56

What accommodations have been designed to protect astronauts from micrometeoroids hitting their spacesuits?

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smooth ER

Back 57

does not have ribosomes attached to it

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rough ER

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has ribosomes attached to it

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forest fires

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What is one of the possible effects of lightning in a thunderstorm?

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aquifers

Back 60

Subsidence, the sinking of the ground because of weakened underground rock layers, can be caused by humans excessively pumping water from where?

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less

Back 61

Regions that do not receive much rain, will have ___________ soil erosion.

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pond life

Back 62

Pollutants from a factory that enter the water in a watershed will have a negative effect on what part of the local ecosystem?

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fertilizer

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Rapid growth of algae in a pond is often the result of excess nutrients from _____________ runoff.

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Gulf prairies and marshes

Back 64

Which eco-region is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico?

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ozone or water

Back 65

The presence of what determines whether or not a planet supports life?

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pioneer

Back 66

Which species is the first species to appear in succession?

Front 67

ecological succession

Back 67

a change in types and numbers of species present in a community over time such as after a disturbance

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muscles and bones

Back 68

Astronauts need to exercise while in space to prevent what from being weakened?

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cell theory

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theory that all living things are made up of cells

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frequent droughts

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What environmental condition will most likely lead to the adaptations that allow a species of fish to not only survive outside of the water, but to actually travel from one water source to another.

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microgravity

Back 71

The straps attached to astronaut's beds to provide a safe sleeping environment accommodates for what condition?

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identical

Back 72

In asexual production, the offspring are __________.

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diverse

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In sexual reproduction, the offspring are _________________.

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dominant

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Recessive genes are expressed in the absence of _____________________ genes for that same trait.

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dominant

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______________________ genes are expressed every time they are found in an organism.

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organ system

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collection of organs that all work together

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plant

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Cell walls and chloroplasts are unique to _______________ cells.

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sustainable

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A great variety of living things is necessary for a ___________________ ecosystem.

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cold

Back 79

If the Earth were further away from the Sun, the Earth would not be able to support life because it would be too _______________.