chemical and physical changes
astronomy
food chains and webs
mixtures and solutions
photosynthesis
100

create a new product 

chemical

100

what is the 3rd planet

Earth

100

the thing every food chain start with 

plants

100

Sand and salt put together make a --------

heterogeneous mixture 

100

Which useful energy conversion is carried out by chlorophyll

 light energy into chemical energy

200

What kind of a change is the melting of ice?

physical change 

200

what is the 5th planet 

jupiter 

200

what is the purpose of the food chain 

 shows how energy is transferred from one living organism to another via food

200

Filtration is used to separate:

soluble mixtures in water

200

What are the products of the light reactions

 ATP, NADPH, and O2.

300

What kind of a change is the cooking of an egg?

chemical change 

300

what is the 1st planet 

mercury

300

Why is it called the food web

 All of the interconnected and overlapping food chains in an ecosystem make up a food web

300

In a solution, the substance that dissolves is the:


solute

300

In photosynthesis, what is ATP required for

store energy for future reactions or be withdrawn to pay for reactions when energy is required by the cell


400

What kind of a change is the burning of coal

chemical change 

400

what i the 8th planet 

neptune

400

 How are food chains and food webs different

A food chain outlines who eats whom. A food web is all of the food chains in an ecosystem


400


If a substance does not dissolve, it is termed:

insoluble


400

In which cell organelles does carbon fixation occur

chloroplast stroma

500

What kind of a change is the mixing of water and oil?

physical change 

500

what is the 7th planet

uranus

500

What is at the top of the food chain for the whole world

apex predators

500

Distillation is a process used to separate mixtures. It is a combination of the two processes:

dissolving and evaporation

500

The green color of leaves is due to chlorophyll

because it does not absorb the green wavelengths of white light

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