Science
Which of the following is a physical change?
A. Burning wood
B. Rusting iron
C. Melting ice
D. Cooking eggs
C. Melting ice
Which force pulls objects toward Earth?
A. Magnetism
B. Friction
C. Electricity
D. Gravity
D. Gravity
Which is a conductor of electricity?
A. Wood
B. Plastic
C. Metal
D. Rubber
C. Metal
Which planet is closest to the Sun?
A. Venus
B. Earth
C. Mercury
D. Mars
C. Mercury
Which is an example of a simple machine?
A. Lever
B. Computer
C. Car
D. Engine
A. Lever
What is the main source of energy for Earth?
A. Moon
B. Sun
C. Wind
D. Water
B. Sun
What is the function of plant roots?
A. Absorb water
B. Make food
C. Attract insects
D. Produce seeds
A. Absorb water
Which is a producer in a food chain?
A. Rabbit
B. Grass
C. Hawk
D. Snake
B. Grass
What is erosion?
A. Breaking rocks
B. Moving soil and rock
C. Forming mountains
D. Melting ice
B. Moving soil and rock
Which system protects the body?
A. Muscular
B. Circulatory
C. Integumentary
D. Digestive
C. Integumentary
Which property can be used to identify a mineral?
A. Color
B. Shape
C. Hardness
D. Size
C. Hardness
Which is an example of renewable energy?
A. Coal
B. Oil
C. Wind
D. Natural gas
C. Wind
What type of energy is stored in food?
A. Thermal
B. Chemical
C. Mechanical
D. Electrical
B. Chemical
Which is a vertebrate?
A. Worm
B. Jellyfish
C. Insect
D. Dog
D. Dog
What type of rock is formed by heat and pressure?
A. Igneous
B. Sedimentary
C. Metamorphic
D. Fossil
C. Metamorphic
What happens when water freezes?
A. It becomes a gas
B. It becomes a solid
C. It disappears
D. It becomes plasma
B. It becomes a solid
What part of the cell controls activities?
A. Nucleus
B. Membrane
C. Cytoplasm
D. Cell wall
A. Nucleus
What causes day and night?
A. Earth’s orbit
B. Earth’s tilt
C. Earth’s rotation
D. Moon’s orbit
C. Earth's rotation
Which gas do plants use in photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
B. Carbon dioxide
What is a habitat?
A. Food source
B. Living space
C. Predator
D. Climate
B. Living space
Which organ system helps move oxygen through the body?
A. Digestive system
B. Respiratory system
C. Skeletal system
D. Nervous system
B. Respiratory System
Which state of matter has a definite shape and volume?
A. Solid
B. Liquid
C. Gas
D. Plasma
A. Solid
Which tool measures temperature?
A. Ruler
B. Thermometer
C. Scale
D. Stopwatch
B. Thermometer
What happens when light hits a mirror?
A. Absorbed
B. Reflected
C. Refracted
D. Transferred
B. Reflected
Which property describes how heavy something is?
A. Volume
B. Mass
C. Length
D. Density
B. Mass
Explain how plants make their own food.
Photosynthesis using chloroplasts
Describe one way humans impact the environment.
Answers may vary
What is the difference between weather and climate?
Weather refers to short-term atmospheric conditions (minutes to weeks), while climate is the long-term average of weather patterns over several years.
Explain how energy transfers in a food chain.
Initial source - sun light
Producers - plants and phytoplankton
Consumers - herbivores, carnivores, and omnivores
Decomposers - fungi and bacteria
Why are fossils important to scientists?
They provide information about past life and environments.