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30 Cards in this Set
- Front
- Back
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What is a Cell?
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Smallest unit of life.
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Which organ absorbs most of the nutrients from food after digestion?
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intestines
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What is the function of the cell membrane?
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Regulates the movement of materials into and out of the cell.
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What % of a human cell's mass is water?
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70
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What is the function of the nucleus?
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Controls the cell's activities and it is where the genetic information is located.
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Which system in your body does not break down food?
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circulatory
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What is a job of the excretory system?
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The excretory system filters wast out of the blood.
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Name a way that unicellular and
multicellular organism are different. |
Unicellular and multicellular are different in the number of cells they have.
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Define the cell.
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Cells are the smallest unit of structure and function of living things.
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What is the mitochondria?
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"powerhouse" produces energy
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What is the job of the cell wall?
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Gives the plant cell support.
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Which organelle is found in all cells?
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Cell membrane
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What does the respiratory and circulatory system do?
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They work together to deliver oxygen to body cells.
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An animal cell ________________.
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performs different jobs, depending on their structure.
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Name a difference between a plant cell and an animal cell.
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Cell walls and chloroplast are only found in a plant cell.
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When a person grows, their bones also get larger. Why does this occur?
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Bone cells make more cells causing a person and their bones to grow.
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What is the job of the ribosomes?
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Makes proteins
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Name the two organelles found in a plant cell that would not be in an animal cell.
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chloroplast and cell wall
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Name a process that is done by all cells.
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breaking down food for energy
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Name something that is not composed of one or more cells.
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molecule
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Name something a red blood cell, nerve cell and a muscle cell have in common.
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They all have a cell membrane.
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What is mitosis?
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Mitosis is .....
necessary for growth replaces worn out or damaged cells creates cells that are identical |
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How does your body repair an injury to your skin?
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Skin cells divide to replace the damaged tissue.
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How does a zygote develop into an embryo?
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The zygote divides by mitosis to produce an embryo with many cells and different tissue layers.
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What is the purpose of the digestive system?
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breaking down food into simpler molecules
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How does a hydroelectric dam produce electricity?
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Mechanical energy from the flowing water produces electricity.
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Use the following equations to solve for the answer.
power = work divided by time work = force x distance Mr. Myers is lifting a load of 40 Newtons. It takes him 10 seconds to lift the load 10 meters. How much power does Mr. Myers have? |
Work = force x distance
40N x 10m 400 joules Power = work divided by time 400j/10 seconds 40 watts of power |
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Use the following equations to solve for the answer.
power = work divided by time work = force x distance Mr. Schmit is lifting a load of 40 Newtons. It takes him 40 seconds to lift the load 5 meters. How much power does Mr. Schmit have? |
Work = force x distance
40N x 5m 200 joules Power = work divided by time 200j/40 seconds 5 watts of power |
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Use the work equation and solve.
work = force x distance Mrs. Johnson is pushing a box down the hallway. She uses a force of 30 Newtons. She moves the box 50 meters and then turns the corner and moves it another 20 meters. What is the work done by Mrs. Johnson? |
work = force x distance
distance = 70 m 30N x 70m work = 2100 Joules |
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Use the work equation and solve.
work = force x distance Mrs. Omstead is pushing a box down the hallway. She uses a force of 50 Newtons. She moves the box 50 meters and then turns the corner and moves it another 40 meters. What is the work done by Mrs. Omstead? |
work = force x distance
distance = 90 m 50N x 90 m work = 4500 Joules |
