Scientific Investigation
A student tests how sunlight affects plant growth by placing plants in different light conditions. What is the independent variable?
A. Plant height
B. Amount of sunlight ✅
C. Type of soil
D. Water given
B. Amount of sunlight ✅
Which structure controls the activities of the cell?
A. Cell membrane
B. Nucleus
C. Cytoplasm
D. Ribosome
B. Nucleus ✅
A force is best described as—
A. Energy in motion
B. A push or pull
C. Speed over time
D. Mass times volume
B. A push or pull ✅
What is the smallest unit of matter that retains the properties of an element?
A. Molecule
B. Atom
C. Cell
D. Compound
B. Atom ✅
What causes day and night on Earth?
A. Revolution
B. Rotation
C. Gravity
D. Tilt
B. Rotation ✅
A student measures the mass of an object using a balance. Which unit will most likely be recorded?
A. Liters
B. Grams
C. Meters
D. Seconds
B. Grams ✅
Which organelle is responsible for releasing energy from food?
A. Chloroplast
B. Nucleus
C. Mitochondria
D. Vacuole
C. Mitochondria✅
What is the SI unit of force?
A. Joule
B. Watt
C. Newton
D. Meter
C. Newton ✅
Which example represents a physical change?
A. Burning wood
B. Rusting metal
C. Cooking Food
D. Melting Ice
D. Melting Ice
What is the primary reason for seasonal changes on Earth?
A. Distance from the Sun
B. Earth’s tilt
C. Moon phases
D. Rotation speed
B. Earth’s tilt ✅
A student repeats an experiment three times and gets similar results each time. What does this indicate?
A. Bias
B. Accuracy
C. Reliability
D. Error
C. Reliability ✅
A plant placed in sunlight produces glucose. Which process is occurring?
A. Respiration
B. Photosynthesis
C. Digestion
D. Fermentation
B. Photosynthesis ✅
A rolling ball has energy due to its motion. What type of energy is this?
A. Potential
B. Thermal
C. Kinetic
D. Chemical
C. Kinetic ✅
Which is evidence of a chemical change?
A. Formation of a new substance
B. Change in shape
C.Change in Size
D. Change in state
A. Formation of a new substance ✅
Which type of rock forms from cooling molten material?
A. Sedimentary
B. Metamorphic
C. Igneous
D. Fossil
C. Igneous ✅
Which tool is best for measuring the volume of a liquid accurately?
A. Ruler
B. Thermometer
C. Graduated cylinder
D. Triple beam balance
C. Graduated cylinder ✅
What is the main function of the cell membrane?
A. Produce energy
B. Store DNA
C. Control movement in and out of the cell
D. Make proteins
C. Control movement in and out of the cell
A car travels 100 meters in 5 seconds. What is its speed?
A. 20 m/s
B. 50 m/s
C. 5 m/s
D. 500 m/s
A. 20 m/s ✅
A substance with a pH of 3 is best classified as—
A. Neutral
B. Base
C. Acid
D. Salt
C. Acid ✅
Which process in the water cycle forms clouds?
A. Evaporation
B. Condensation
C. Precipitation
D. Runoff
B. Condensation ✅
Why is it important to include a control in an experiment?
A. To increase speed
B. To compare results
C. To change variables
D. To reduce data
B. To compare results ✅
Which structure is found in plant cells but not animal cells?
A. Chloroplast
B. Cell membrane
C. Nucleus
D. Cytoplasm
A. Chloroplast ✅
A rocket launches upward, pushing gases downward. Which law explains this motion?
A. Newton’s 1st Law
B. Newton’s 2nd Law
C. Newton’s 3rd Law
D. Law of Gravity
C. Newton’s 3rd Law ✅
Which states of matter have definite volume but different shapes?
A. Solid and gas
B. Liquid and gas
C. Solid and liquid
D. Gas only
C. Solid and liquid ✅
Which resource is considered renewable?
A. Coal
B. Oil
C. Solar energy
D. Natural gas
C. Solar energy ✅