An ice cube has a mass of 15 grams. The ice cube melts. Which statement is TRUE about the ice cube?
A. The ice cube has a greater mass than the melted cube.
B. Ice cube has less mass that melted cube.
C. Ice cube has same mass as melted cube.
D. Melted cube has mass of 10 grams.
What is C. Ice cube has same mass as melted cube.
100
The flow of an electric charge.
What is an electric current?
100
The largest group of microorganisms.
What is bacteria?
100
The term for living things that make their own food, such as plants.
What is producer?
200
A glacier moving a boulder is an example of this.
What is erosion?
200
The mass of a substance in a certain volume.
What is density?
200
A complete path for the flow of electric current.
What is a closed circuit?
200
Living things too small to be seen without a microscope.
What are microorganisms?
200
A living thing that eats other living things to get energy, such as animals.
What is a consumer?
300
The process that drops rock particles in new places.
What is deposition?
300
State of matter that has a fixed volume but not a fixed shape.
What is a liquid?
300
The four main parts of a simple electrical circuit.
What are electrical source, a load, a connector, and a switch?
300
These microorganisms help put oxygen into the air.
What is algae?
300
List the 5 groups of vertebrates.
What are: fish, amphibians, reptiles, birds, and mammals?
400
The landform that is deposited by a glacier.
What is a moraine?
400
Cutting, breaking, bending, warming, melting, crushing, and dissolving are all examples of this.
What are physical changes?
400
An incomplete path for the flow of an electric current.
What is an open circuit?
400
Medicines that cure diseases caused by bacteria.
What are antibiotics?
400
A group of living things that breaks down the remains of dead organisms to feed on them, like mushrooms.
What is a decomposer?
500
Which one can cause an earthquake?
A. erosion of rock
B. a landslide
C. weathering of rock
D. movement of rock along a fault
What is D. movement of rock along a fault?
500
The process of changing liquid water to water vapor.
What is evaporation? (What is heating the water?)
500
Which of these is a conductor?
rubber
glass
copper
plastic
What is copper?
500
Name two microorganisms that are harmful.
What are certain bacteria (Salmonella, E. coli, Streptococcus)
certain porozoa, fungi, viruses, and certain algae?
(ONLY TWO ANSWERS REQUIRED)