Science Studies Weekly

If a sheet of paper has been folded into a paper airplane, what has happened to the paper?

• a chemical change

• a physical change

• a chemical property

• a physical property

What is needed for matter to change from one state to another?

• air

• water

• chemicals

• energy

What do plants need to make food: carbon dioxide, water, and ____________________?

• protein

• oxygen

• sunlight

• rain

What is happening when your body changes the food you eat into energy you need to grow?

• a chemical change

• a physical change

• a chemical property

• a physical property

What must be added for the water in a pond to evaporate into the air (change from a liquid to a gas)?

• heat

• light

• space

• air

What do scientists call the temperature at which solids start to change into a liquid?

• the boiling point

• the melting point

• the condensation point

• the freezing point

Which of the following is a manmade fabric invented by chemist Wallace Carothers?

• silk

• cotton

• wool

• nylon

Which of the following statements is true?

• Molecules in your body never change

• particles in gases are tightly packed and do not move

• matter is always changing

• matter can never change from one state to another

What is the temperature at which a solid starts to become a liquid?

• melting point

• freezing point

• freezing

• boiling

What is the temperature at which water turns into a solid is O degrees Celsius or 32 degrees Fahrenheit?

• boiling point

• freezing point

• melting point

• condensation point