Science 6, Semester A Review

Which of these are not examples of matter?

• carbon dioxide

• energy

• heat

• jelly

• sponge

Matter is anything that has mass and takes up space. Which units of measurement can you use to describe these two properties?

• seconds and kilometers

• milligrams and square meters

• grams and millimeters

• kilograms and cubic millimeters

• yards and liters

Which sentence about particles in matter is true?

• A. Atoms are present in solids and liquids but not in gases.

• B. The particles of matter are in constant motion.

• C. The same kinds of atoms are found in different elements.

• D. When a solid changes to a liquid, the sizes of the particles change.

Dylan has two cubes of iron. The larger cube has twice the mass of the smaller cube. He measures the smaller cube. Its mass is 20 grams, and its density is 7.87 g/cm³. What’s the larger cube’s volume?

The larger cube’s volume is about..... cm³.

Which substances form a homogeneous mixture when mixed with water?

Which substance is a combination of different atoms?

• A. homogeneous mixture

• B. heterogeneous mixture

• C. element

• D. compound

Celina has a water sample that’s contaminated with salt and microorganisms. Which method should she use to purify the water?

• A. distillation

• B. filtration

• C. osmosis

• D. reverse osmosis

A scientist is creating a new synthetic material. The material’s density is 6.1 g/cm³. Which sentences describe how the scientist can lower the material’s density?

• The scientist can decrease the mass while keeping the volume constant.

• The scientist can increase the mass while keeping the volume constant.

• The scientist can decrease the volume while keeping the mass constant.

• The scientist can increase the volume while keeping the mass constant.

The atmospheric temperature decreases when snow starts melting because the snow .... from the atmosphere to melt.

Compare a cup of hot coffee with the Pacific Ocean. Which statement about thermal energy and temperature is correct?

• A. Water in the Pacific Ocean has more thermal energy and a higher temperature.

• B. Water in the Pacific Ocean has less thermal energy and a lower temperature.

• C. Water in the Pacific Ocean has less thermal energy and a higher temperature

• D. Water in the Pacific Ocean has more thermal energy and a lower temperature.