What happens when an object has a density greater than that of the surrounding object?
a. the object will sink
b. the object will float
c. the object will become a solid
d. the object object will become a gas

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion