Life Science
Which of the following objects would reflect the greatest amount of light from a flashlight?
A. a brick wall
B. a glass window
C. a bathroom mirror
D. a sheet of black paper
C. mirror
This part of the flower makes the food for the plant and releases oxygen.
Leaf
Anything that takes up space and has mass?
matter
Which of the following describes water changing from liquid to solid?
A. ice forming on a lake
B. dew forming on grass
C. snow melting into a puddle
D. water evaporating from a pond
A. ice forming
Which of the following happens only during the adult stage of the life cycle of a frog?
A. A frog lays eggs.
B. A frog swims in water.
C. A frog begins to lose its tail.
D. A frog begins to develop lungs.
A. A frog lays eggs
What form of energy makes a compass needle point north?
A. electrical B. heat C. light D. magnetic
D. magnetic
Crickets and beetles compete for food. If a disease wipes out all the crickets, what happens to the number of beetles?
The number of beetles will increase because they will have more food
When heat is added to matter, what happens to its particles?
They move faster
Water moves directly from a lake to the air by which of the following processes?
A. condensation B. evaporation C. precipitation D. sedimentation
B. evaporation
In a meadow ecosystem, mice receive most of the energy they need to survive directly from which of the following sources?
A. minerals B. oxygen C. plants D. water
C. plants
Which is an example of a chemical change?
A. wood that has burned to ashes
B. paper that is cut into pieces
C. ice that melts into water
D. clay that is rolled into a ball
Why is seawater considered a solution?
The salt is dissolved into the water
Two or more substances that are mixed together but can be separated is?
How many objects in our solar system can be classified as a star?
A. 0 B. 1 C. 3 D. 9
B. 1 (the Sun)
Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils?
A. Decomposition adds silt to soil.
B. Decomposition adds water to soil.
C. Decomposition adds oxygen to soil.
D. Decomposition adds nutrients to soil.
D. adds nutrients
Which of the following examples best describes one type of energy changing into another?
A. a magnet sticking to a refrigerator
B. sound traveling through a solid wall
C. an electric heater warming up a cold room
D. light rays bending as they pass through glass
How many days does it take the Earth to revolve around the Sun?
365
Water vapor cooling and turning into water droplets/steam is an example of?
condensation
How do we see the moon?
It reflects light from the Sun
The stages in the life cycle of an organism are shown below. birth → growth → development → reproduction → death In which life cycle stage will a new organism be made?
reproduction
Which investigation would provide evidence of a chemical change?
A. Spray perfume into the air, and when the air and perfume mix, observe the change in odor that happens as they mix.
B. Put an antacid tablet in water, and when the antacid and water mix, observe the bubbles that form as a new substance is created.
C. Heat water in a pan on a stove, and observe the steam that forms as the state of matter of the water changes.
D. Blow air through a wand filled with soap solution, and observe the bubbles that form as the air becomes trapped.
B. antacid tablet in water
Characteristic passed from parents to offspring
inherited traits
Mary is comparing and contrasting the mixtures in her kitchen. Which mixture is a solution?
A. Granola
B. Lemonade
C. Garden salad
D. Jello with bananas
B. lemonade
A front is
The place where two air masses meet