Life Science
What is one way microorganisms can be beneficial to humans?
a. Cause disease
b. decompose wood
c. decompose waste
d. decay tooth enamel
c. Microorganisms decompose waste.
A circuit connecting the switches, lightbulbs, and buzzers must start and end at the power source before the circuit can work.
The _______ carries the current throughout the circuit.
Wire
Which process is responsible for breaking down rocks into smaller pieces?
A. Deposition
B. Weathering
C. Erosion
D. Compaction
B. Weathering
Which example best shows a destructive process?
A. Lava cooling to form new land
B. Sand being deposited to form a beach
C. Wind wearing away rock
D. Sediment building up in a river
C. Wind wearing away rock
When ice melts into water, it is an example of a ______________.
Physical Change
a. environmental
b. biological
c. survival
d. inherited
d. inherited
In class, Sam's teacher showed the students how they could see the force lines surrounding a bar magnet.
Afterwards, Sam waved a magnet across four piles of metal to see if he could see any force lines. Which metal pile would be attracted to a magnet?
A. Aluminium
B. Brass
C. Iron
D. Sand
C. Iron
Which process is constructive?
A. Erosion by wind
B. Weathering by ice
C. Deposition of sediment
D. Breaking rocks apart
C. Deposition of sediment
Which surface feature is most likely formed by erosion?
A. Canyon
B. Sand dune
C. Mountain
D. Volcano
A. Canyon
Bubbling or fizzing during a reaction may be a sign of a __________.
Chemical Change
Mrs. Sail's class wanted to observe a local pond. The class collected some pond water to analyze. When they placed a drop of water under a microscope, they saw many squiggly shapes that were swimming through the water. These could be an example of what?
A. Microorganisms that live in the pond
B. Atoms floating through the water.
C. Protons and Electrons locomotion.
D. Chemicals dumped into the pond.
A. Microorganisms that live in the pond
Magnets and electromagnets can both be used to pick up metal items like iron nails.
Even though they are similar, there are differences between magnets and electromagnets.
An example of one of these differences is that...
A magnets require an electric current to work.
B electromagnets require an electric current to work.
C magnets will stick to your refrigerator, while electromagnets will not.
D electromagnets will stick to your refrigerator, while magnets will not.
B. Electromagnets require an electric current to work.
What is the main difference between erosion and weathering?
A. Weathering moves rocks; erosion breaks them down
B. They are the same.
C.Erosion moves sediments; weathering breaks rocks into smaller pieces
D. Erosion only happens in water
C. Erosion moves sediments; weathering breaks rocks into smaller pieces
Volcanoes create new land by—
A. Eroding rock
B. Depositing lava that cools and hardens
C. Breaking down soil
D. Moving sediment with wind
B. Depositing lava that cools and hardens
Electricity is a form of __________ that can produce light, heat, and motion.
Energy
Which of the following statements about cells is NOT true?
A. Cells are the basic unit of life.
B. Most cells can only be seen with a microscope.
C. Cells are only found in animals.
D. Some organisms are made up of a single cell.
C. Cells are only found in animals.
Electricity interacts with materials depending on their conductivity. Materials that carry electricity efficiently are
considered conductors, while materials that carry electricity poorly are considered insulators.
Choose the THREE statements that correctly describe either insulators or conductors of electricity.
A. A simple circuit with a light bulb could be used to test materials for conductivity.
B. Some common conductors are copper, aluminum, gold, and silver.
C. Some effective insulators include glass, air, plastic, rubber, and metal.
D. Metal wires are effective insulators because they cannot conduct electricity.
E. Rubber is an insulator often used to protect metal wires carrying electric currents.
A.
B.
E.
Sand dunes are formed when wind—
A. Deposits sand in new locations
B. Melts rocks into lava
C. None
D. Causes earthquakes
A. Deposits sand in new locations
How do plants (organisms) affect Earth’s surface?
A. They only destroy land
B. They have no effect
C. They can both break rocks and help form soil
D. They only cause erosion
C. They can both break rocks and help form soil
Materials that allow electricity to flow easily are called __________.
Conductor
Which statement about most vascular plants and non-vascular plants is true.
A. Both plant types have long tube-like structures for gathering water.
B. Vascular plants produce seeds and non-vascular plants produce spores
C. Vascular plants take in Oxygen and let out Carbon Dioxide.
D. Plants are not separated into vascular and non vascular
B. Vascular Plants produce seeds and non-vascular plants produce spores
Haile and LaTasha coiled some wire around a nail and connected the wires to a battery. They noticed a compass
started pointing in a different direction. What caused the compass to change direction?
A They made an electromagnet, and its magnetic field affected the compass.
B The electricity was flowing through the wires in an open circuit.
C The electricity was flowing through the wires in an incomplete circuit.
D Their friend Diego was moving the compass.
A. They made an electromagnet, and its magnetic field affected the compass.
For many centuries, rocks on the side of a cliff formed a face that people called the Old Man of the Mountain. Then the rocks fell off.
A People blasted the rocks away.
B Blowing winds smoothed away the jagged rock pieces.
C The force of gravity grew stronger and pulled the rocks to the ground.
D Freezing and thawing cracked the rocks into smaller pieces that fell due to gravity.
D Freezing and thawing cracked the rocks into smaller pieces that fell due to gravity.
Which scenario best explains how a delta forms?
A. Wind erodes rocks into sand
B. Water slows down and drops sediment at the mouth of a river
C. Lava cools quickly
D. Ice breaks rocks apart
B. Water slows down and drops sediment at the mouth of a river
Materials that do not allow electricity to flow easily are called __________.
Insulators