March Revision: Properties of Matter and Energy Quiz

Which statement best explains why metals are good conductors of electricity?

• They have a crystal lattice structure
• They have a sea of free-moving electrons
• They are malleable and ductile
• They have high melting points

Why would a scientist choose to use universal indicator instead of litmus paper?

• It's cheaper
• It shows specific pH values through different colors
• It's more readily available
• It's easier to store

What property allows bronze to be more useful than pure copper in some applications?

• It conducts electricity better
• It is lighter in weight
• It is harder and doesn't rust
• It has a lower melting point

If you walked 3 km north, then 4 km east, why would your displacement be less than your total distance traveled?

• Because displacement only measures horizontal movement
• Because displacement is always measured in straight lines
• Because displacement is the shortest path between start and end points
• Because distance includes vertical movement only

A student creates a new alloy by mixing copper with zinc. What is the most likely reason for doing this?

• To make it more colorful
• To improve its properties over pure copper
• To make it less expensive
• To make it more abundant

Why does acid rain have devastating effects on ancient marble statues?

• It makes them more brittle
• It chemically reacts with the calcium carbonate
• It changes their color
• It makes them magnetic

What is the key difference between an acid and an oxyacid?

• Oxyacids contain oxygen atoms
• Acids are stronger
• Oxyacids don't contain hydrogen
• Acids only exist in liquid form

Why do most nonmetals appear dull while metals have luster?

• Nonmetals are always darker in color
• Metals reflect light better due to their free electrons
• Nonmetals are always gases
• Metals are always polished

When calculating potential energy, why do we multiply by height?

• Because taller objects are always heavier
• Because gravity pulls harder at greater heights
• Because objects gain more stored energy when raised higher
• Because height determines an object's mass

Why do hydrangea flowers change color based on soil pH?

• The flowers absorb different nutrients
• The pH affects the flower's pigment structure
• The plants grow differently in different pH levels
• The flowers reflect light differently