Science Test Unit 2

What are the tiny building blocks that make up all elements?

• atoms

• molecules

• space

• compounds

What happens to sugar when it is dissolved into water?

• The sugar vanishes.

• The sugar evaporates into the air.

• Candy is formed.

• The sugar goes through a physical change.

What are the elements that make up the molecule and how many of each element are present.

• 1 hydrogen, 1 sulfur, 1 oxygen

• 1 hydrogen, 1 sulfur, 4 oxygen

• 2 hydrogen, 2 sulfur, 4 oxygen

• 2 hydrogen, 1 sulfur, 4 oxygen

Jenny has a mixture of sand, sugar, common salt, and milk powder. She adds some water to the mixture. Which of these can be separated easily from the mixture after adding water?

• sand

• sugar

• table salt

• milk powder

Which of the following statements best define a property of matter?

• An object that someone owns

• Characteristic that can be used to identify a substance

• Shape, size and mass of a substance

• None of the above

If we compare and contrast the three liquids seen in the jar, the BEST explanation would be that ...

• oil is lighter than water and syrup

• syrup is the thickest liquid of the three

• oil is the least buoyant of the three liquids

• water is denser than oil, but less dense than syrup

Which of the following has the greatest distance between the individual particles?

• Ice

• Water

• Water vapor

• All have the same distance

You have a small piece of iron at 75 °C and place it into a large container of water at 25 °C. What temperature is the water most likely to become?

• 25°C

• 30°C

• 75°C

• 80°C

What is the MAIN reason water from the oceans turns to water vapor?

• Ocean breezes

• Changing tides

• Moon’s gravitational pull

• Heat from the sun

Sarah is going on a trip and is taking her art supplies with her. Her parents told her she will have to leave them in the car during some activities. Sarah wants to keep her crayons from melting so she is looking for the best container to place them in. What could she use as a container that will insulate her crayons?

• Paper lunch bag

• Metal lunch box

• Thermal lunch bag

• Cardboard shoe box