Science Test Week 13

Question 1

Diffusion

Answer 1

movement of particles or molecules from an area of high concentration to an area of low concentration

Question 2

What causes diffusion?

Answer 2

the constant random movement of molecules

Question 3

Diffusion will continue until

Answer 3

concentrations are even and molecules are evenly spread

Question 3

Osmosis

Answer 3

diffusion of water across a semipermeable membrane

Question 4

Semipermeable

Answer 4

some molecules are let through

Question 5

Cell membrane

Answer 5

selectively permeable - lets some things through; controls what goes in and out of a cell

Question 6

purpose of cellular respiration

Answer 6

produces energy used in cellular functions

Question 7

Where does cellular respiration happen?

Answer 7

mitochondria - little power plants

Question 8

Respiration

Answer 8

chemical reaction where sugar is combined with oxygen to make energy (ATP) plus carbon dioxide and water

Question 9

Cellular Respiration in Plants and Animals

Answer 9

Compare: reactants and products are same in plants and animals
Contrast: the source of the reactants

Question 10

Photosynthesis

Answer 10

chemical reaction that allows plants to make their own food in the form of sugar carbohydrate molecule

Question 11

Where does photosynthesis occur?

Answer 11

In the chloroplasts.

Question 12

Where does energy come from for photosynthesis?

Answer 12

sunlight

Question 13

Photosynthesis

Answer 13

sunlight plus carbon dioxide from the air and water to make sugar

Question 14

What is released into the environment during photosythesis?

Answer 14

oxygen

Question 15

The sugar molecule made during photosynthesis is sent to

Answer 15

the mitochondria to make ATP

Question 16

Stomata

Answer 16

tiny holes in a leaf that allow for gas exchange of oxygen and carbon dioxide