Science 6 Grade Chapter 1 Lesson 1

Front 1

Organelles, found only in plant cells, in which sugar is made during photosynthesis.

Back 1

chloroplasts

Front 2

A stiff outer layer that surrounds a cell, protects it, and gives it its shape.

Back 2

cell wall

Front 3

The control center of a cell that directs the cell´ activities.

Back 3

nucleus (cell)

Front 4

Structures in the nucleus that contain an organism´ genetic information and regulate the cell´ activities.

Back 4

chromosomes

Front 5

Abbreviation for deoxyribonucleic acid, the chemical that provides detailed instructions for cells.

Back 5

DNA

Front 6

A group of specialized cells with the same structure and function.

Back 6

tissue

Front 7

A structure that contains at least two types of tissue that work together to perform a specific function.

Back 7

organ

Front 8

Type of reproduction in which a sperm cell and an egg cell unite to form a single cell.

Back 8

sexual reproduction

Front 9

Pieces of DNA that carry all the information passed from parents to their offspring.

Back 9

genes

Front 10

Describes a stronger trait that will show up in an organism even if only one factor for it is present.

Back 10

dominant

Front 11

Describes a weaker trait that will show up in an organism only if no factor for the dominant trait is present.

Back 11

recessive

Front 12

The second part of the cell theory states that all ________ ___________ take place in cells.

Back 12

life processes

Front 13

The first part of the cell theory states that cells are the _____ ______ of all living things

Back 13

building blocks

Front 14

Some organisms have _____ ____ ______, while others have many.

Back 14

only one cell

Front 15

the parts of a living organism, such as its hair, skin, or leaves, are made of ______ _____ ____ _____.

Back 15

different kinds of cells with different functions

Front 16

A human has ______ ____ _______ of cells.

Back 16

hundreds of kinds

Front 17

The third part of the cell theory states that new cells are ______ ______ _______ _____.

Back 17

produced from existing cells

Front 18

Living things begin life as a ____ ______.

Back 18

single cell

Front 19

_____ _____ is what causes you or any other organism to grow.

Back 19

Cell division

Front 20

Your body constantly produces ___A_____ to replace _____B______.

Back 20

A. new cells
B. cells that die

Front 21

_________ is a single-celled organism found in fresh water.

Back 21

Stentor

Front 22

structures that perform specific functions.These structures help keep the cell alive and healthy.

Back 22

These structures are called organelles.

Front 23

The organelles are surrounded by _________, a clear, jellylike substance that holds them in place.

Back 23

cytoplasm

Front 24

Only plant cells contain organelles called __________.

Back 24

chloroplasts

Front 25

The chloroplasts make the plant’s food (sugar) by the process of ____________.

Back 25

photosynthesis

Front 26

Chloroplasts are found mostly in the cells of a plant’s leaves.

Back 26

Chloroplasts

Front 27

_________ are found mostly in the cells of a plant’s leaves.

Back 27

Chloroplasts

Front 28

______ - a stiff outer layer that surrounds and protects the cell and gives it shape

Back 28

cell wall

Front 29

Animal cells don’t have cell walls, but both plant and animal cells have a _____ _____ that holds the cell material inside.

Back 29

cell membrane

Front 30

____ _____ - holds the cell material inside and controls what substances enter and leave the cell.

Back 30

cell membrane

Front 31

Both plant and animal cells have organelles called _______, which store nutrients and wastes.

Back 31

vacuoles

Front 32

Vacuoles are much bigger in plant cells because they are the storage places for the _____, _______, and ______ the plant produces.

Back 32

the sugar, wastes, and water the plant produces.

Front 33

______- is the cell’s control center—it directs all of the activities that take place inside the cell.

Back 33

The nucleus

Front 34

The nucleus contains ________, the structures that carry an organism’s genetic information.They also control activities within the cell.

Back 34

chromosomes

Front 35

The ______ _______ surrounds the nucleus and holds it together.

Back 35

nuclear membrane

Front 36

Cells also contain bean-shaped organelles called ________. Food and oxygen combine in the _________ to release the food’s energy, carbon dioxide (CO2), and water (H2O).

Back 36

mitochondria

Front 37

Food and oxygen combine in the mitochondria to release the food’s energy, carbon dioxide (CO2), and water (H2O). This process is known as __________.

Back 37

respiration

Front 38

The energy released during ________ enables a plant or animal to complete all its cell activities.

Back 38

respiration

Front 39

The __________ in the nucleus contain instructions for all cell activities.

Back 39

chromosomes

Front 40

__________ are made up of DNA and proteins.

Back 40

Chromosomes

Front 41

______ - This chemical provides detailed instructions to the cell about every function of life.

Back 41

DNA (deoxyribonucleic acid )