Energy Flow & Property Changes

All living things are made of _______, and all living things need _______. 

• matter, plants
• energy, matter
• matter, energy

Oxygen is released into the air by

• The sun
• Animals
• Volcanoes
• Plants

Which of these best explains why predators need plants, such as grass, in their ecosystem?

• Plants are a large part of their diets
• Plants provide safety for predators
• Plants break down the organisms that the predators eat
• Plants provide food for their animals that the predators eat

What is indicated by the diagram?

• Food web
• Food chain
• Food map
• Food menu

In the food chain, which of the pictures is a PRODUCER?

• Sun
• Plants
• Ladybug
• Chicken

Which animal is the top predator?

• hawk

• lizard

• snake

• grass

How much energy is transferred from one trophic level to the next in an energy pyramid?

• 1%

• 10%

• 100%

• 90%

Which of the following is an example of a physical change?

• Water freezing into ice.

• A piece of wood burning.

• A toy car rusting.

• Zinc producing hydrogen gas when mixed with water.

What type of change has occurred when a nail rusts?

• A physical change

• A chemical change

• An atomic change

• A reactive change

What is an example of a chemical change that happens inside your body?

• Food being broken down by enzymes in your stomach

• Food being broken into small pieces by your teeth

• Food being moved from your esophagus into your stomach

• Water being absorbed inside your large intestine