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100
Which statement about the molecules in ice and the molecules in liquid water is correct?
The molecules in ice are less free to move than the molecules in liquid water.
100
Is Oxygen a compound?
Water
100
Does Ca represent carbon?
C
100
Evidence of a chemical change?
Rusting Car fender
100
Moisture that collects on the outside of a cold glass results from the process of?
Condensation
200
A hot air balloon rises because?
molecules move faster and farther apart when heated
200
The solid, liquid, and gaseous states of water differ from each state in?
the average speed of movement of the individual molecules
200
A different chemical substance is formed when a?
candle burns
200
Carbon dioxide is ...?
A compound
200
A chemical change combining two elements results in...?
A Compound
300
All plant and animal life on Earth contains what element?
carbon
300
Which is usually true about metals?
Metals conduct electricity more easily than nonmetals
300
When a gas forms a liquid, which process is taking place?
condensation
300
The element beryllium (be, atomic number 4 and atomic mass 9) is right above magnesium (Mg, atomic number 12 and atomic mass 24) in the periodic table. How many more electrons does magnesium have than beryllium?
8
300
What is an example of a chemical change?
wood burning
400

Based on the melting points below which material would still be a solid at 400 degrees C?

Beeswax           62 degrees C

Gold             1063 degrees C

Lead              327 degrees C

Oxygen         -218 degrees C




Gold
400

What action would result in a chemical change?

a.Crumpling several sheets of paper

b. pounding a mail into a piece of wood

c. peeling and slicing a carrot

d. making blueberry muffins

making blueberry muffins
400
The amount of matter in an object is called its...?
Mass
400
A chemical change for a piece of metal is called its?
getting rusty
400

What symbolizes a molecule of a compound?

A. He

B. Be

C. N2

D. NaCl

NaCl
500
Putting sand and salt together makes?
A mixture
500
The chemical symbol Al represents what metal on the periodic table?
Aluminum
500
All of the substances on the periodic table are classified as elements because they?
Cannot be broken down into other substances
500
A difference between physical change and chemical change is that?
Different kinds of molecules are present after a chemical change but not after a physical change
500
Each element in the periodic table is assigned an atomic number. This number is the same as...?
The number of protons in the atom's nucleus
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