POST TEST REVIEW

What was the average temperature for this biome during February?

• 29

• 28

• 23

• 22

2.4 × 10³ expressed as a number is —

• 2,400

• 24,000

• 240,000

• 2,400,000

Which of these best describes the particle motion taking place as CO₂ gas is exposed to freezing temperatures?

• The motion of the particles becomes random.

• The particles decrease in speed.

• The motion of the particles is unchanged.

• The particles move with more force.

What is an example of a compound?

• Table salt (NaCl)

• Sodium (Na)

• Air

• Oxygen (O)

What is an example of a mixture?

• Pure Water (H₂O)

• Air

• Table Salt (NaCl)

• Oxygen (O)

What is a chemical property of matter?

• Acidity

• Color

• Texture

• Shape

This experiment was set up to test the hypothesis that plants grow faster in green light. Each plant was grown in the same type of pot, received the same amount of water and fertilizer.

The amount of fertilizer given to each plant is?

• a control

• a constant

• independent variable

• dependent variable

When Magnesium (group 2) forms a bond with Oxygen (Group 16), what will occur?

• Magnesium will give away its two valence electrons to form an ionic bond.

• Magnesium will share its two valence electrons to form an covalent bond.

• Magnesium will give away its two valence electrons to form an covalent bond.

• Magnesium will share its two valence electrons to form an ionic bond.

How is the modern model of an atom different from the Bohr atomic model?

• The arrangements of the electrons are different.

• The numbers of electrons are different.

• The shapes of the nuclei are different.

• The masses of the atomic particles are different.

One of Dalton’s conclusions concerning his atomic theory was that all atoms of the same element are —

• the same

• different