Select all the correct locations on the image.

Which items are matter?

Select all the correct answers.

Consider this statement: Air is matter. Which facts best support the statement?

• Balloons can be filled with air.

• Air is essential for life to exist.

• Air has mass.

• Air is not an element.

• To float on air is to be happy.

Drag each tile to the correct box.

Sort the types of energy according to the order in which they move through this system:

Water stored in dams falls freely with the force to make a turbine move. The turbine moves and produces electricity. This electric energy is supplied to homes. At home, we use electricity for heating, cooling, and lighting.

• kinetic energy

• potential energy

• light energy

• electrical energy

Type the correct answer in the box. Use numerals instead of words.

Anne has a sample of a substance. Its volume is 20 cm³, and its mass is 100 grams. What is the sample’s density?

The sample’s density is ______g/cm³.

Drag each label to the correct image. Each label can be used more than once.

Label the samples based on their pH values.

Groups:

(a) alkaline

,

(b) acidic

,

(c) neutral

• 
• 
• 
• 
• 
• 

Select the correct answer.

Darryl finds a bottle of what looks like clear water, with dirt settled at the bottom. When he shakes the bottle, the water gets dirty. Which term best describes the matter in the bottle?

• substance

• homogeneous mixture

• heterogeneous mixture

• element

• compound

Select the correct answer from each drop-down menu. We can change a gas to liquid by (a)   the temperature and ​ (b)   the pressure.

• decreasing
• removing
• increasing

Select the correct answer.

When James sprayed liquid deodorant under his arm, the spot felt cold. Which sentence best explains why?

• The deodorant evaporates as it absorbs thermal energy from James’s skin.

• The deodorant condenses as it absorbs thermal energy from James’s skin.

• The deodorant evaporates as it transfers thermal energy to James’s skin.

• The deodorant evaporates as it absorbs temperature from James’s skin.

• The deodorant is a liquid that freezes at room temperature and pressure.

Drag each tile to the correct box.

Arrange the steps in order to describe what happens to a liquid when it is heated.

• The particles of liquid move faster.

• The liquid changes to a gas.

• The liquid gains thermal energy.

• The space between the liquid particles increases.

Type the correct answer in each box.

The atomic number of sodium (Na) is 11. The element phosphorous (P) is the fourth element to the right of sodium in the periodic table.

The atomic number of phosphorus is _____. It has zero charge because it has _____ electrons.