Biology
What is the basic unit of life? A: Atom, B: Cell, C: Tissue, D: Organ
What is a B: Cell
Which planet is known as the "Red Planet"? A: Venus, B: Saturn, C: Mars, D: Jupiter
What is C: Mars known as the "Red Planet".
What is the chemical symbol for water? A: CO2, B: O2, C: H2O, D: NaCl
What is C: H2O, hydrogen and oxygen make water which is so cool.
In a food chain, which organism is typically found at the top? A: Producer B: Primary Consumer C: Secondary Consumer D: Tertiary Consumer
What is D: Tertiary Consumer/Predator
Which organelle is responsible for producing energy in the cell?
A) Centrioles
B) Ribosome
C) Mitochondria
D) Chloroplast
What is C. Mitochondria
What is a light-year?
A) The time it takes for the Earth to orbit the Sun
B) The distance light travels in one year
C) The time light takes to travel from the Sun to Earth
D) The distance between two stars
What is B. The distance light travels in one year
Which of the following is a property of metals? A: They are brittle and dull, B: They are poor conductors of heat, C: They are malleable and conduct electricity, D: They do not react with acids
Who is C: They are malleable and conduct electricity.
What is the main role of producers in an ecosystem?
A) Break down dead organisms
B) Consume herbivores
C) Use sunlight to make food through photosynthesis
D) Feed only on carnivores
What is C: Use sunlight to make food through photosynthesis
Which part of the cell contains the genetic material?
A) Cytoplasm
B) Nucleus
C) Cell membrane
D) Mitochondria
What is B: Nucleus
What force keeps the planets in orbit around the Sun?
A) Electromagnetic force
B) Gravity
C) Nuclear force
D) Friction
What is B. Gravity
Which of the following best describes a chemical change?
A) Ice melting into water
B) Sugar dissolving in water
C) Iron rusting
D) Water boiling
What is C: Iron rusting
What would most likely happen if all the decomposers in an ecosystem were removed?
A) Plants would grow faster
B) Nutrients would not be recycled
C) Carnivores would increase in number
D) There would be more producers
What is B: Nutrients would not be recycled
Which structure in the cell acts as a selective barrier, controlling what enters and exits?
A) Cell wall
B) Cytoplasm
C) Cell membrane
D) Endoplasmic reticulum
What is a C. Cell membrane
Which of the following best explains why the Sun appears much larger than other stars in the night sky?
A) It is the largest star in the universe
B) It is the closest star to Earth
C) It emits more light than any other star
D) It is moving toward Earth
What is B: It is the closest star to Earth
What happens to the atoms during a chemical reaction?
A) Atoms are created and destroyed
B) Atoms change into different elements
C) Atoms rearrange to form new substances
D) Atoms lose electrons permanently
What is C: Atoms rearrange to form new substances
Why is biodiversity important in an ecosystem?
A) It reduces the amount of sunlight needed
B) It increases the variety of abiotic factors
C) It helps ecosystems recover from disturbances
D) It decreases energy transfer in food chains
What is C: It helps ecosystems recover from disturbances
What does DNA stand for?
A) Deoxyribonucleic Acid
B) Deoxyribose Nucleic Acid
C) Dioxyribonucleic Acid
D) Deoxynucleotide Acid
What is A: Deoxyribonucleic Acid
What is the name of the point of no return around a black hole?
A) Event horizon
B) Singularity
C) Photon sphere
D) Accretion disk
What is A: Event Horizon (not learned)
What is an example of a colloid?
A) Salt water
B) Blood
C) Milk
D) Mud
What is C: Milk
A wetland area is drained for agriculture, leading to habitat loss for several species. What long-term effect is most likely to occur?
A) Increase in native species
B) Improved biodiversity
C) Decline in ecosystem stability
D) Growth of aquatic food webs
What is C: Decline in ecosystem stability