7th grade review

What do we call a change in an organism that helps it survive in its environment?

A) Mutation B) Adaptation C) Evolution D) Migration

What is the primary source of energy for the Earth?

A) The Moon B) The Sun C) The Earth’s core D) Wind

Which gas do plants absorb from the atmosphere during photosynthesis?

A) Oxygen B) Carbon Dioxide C) Nitrogen D) Hydrogen

What is the process by which cells divide to form new cells?

A) Mitosis B) Meiosis C) Photosynthesis D) Respiration

Which layer of the Earth’s atmosphere contains the ozone layer?

A) Troposphere B) Stratosphere C) Mesosphere D) Thermosphere

What is the chemical formula for water?

A) CO2 B) H2O C) O2 D) NaCl

Which type of rock is formed from cooled magma or lava?

A) Metamorphic B) Sedimentary C) Igneous D) Organic

What is the main function of the roots of a plant?

A) Photosynthesis B) Water absorption C) Reproduction D) Gas exchange

Which organ is primarily responsible for pumping blood throughout the body?

A) Brain B) Lungs C) Heart D) Liver

Which type of energy is stored in food?

A) Kinetic energy B) Potential energy C) Thermal energy D) Chemical energy

What do you call the movement of water through a plant?

A) Evaporation B) Transpiration C) Photosynthesis D) Respiration

What part of a cell contains genetic information?

A) Cytoplasm B) Nucleus C) Cell membrane D) Mitochondria

Which of the following is NOT a characteristic of living things?

A) Growth B) Reproduction C) Movement D) Inheritance of acquired traits

What do we call the variety of different species in an ecosystem?

A) Biodiversity B) Biome C) Habitat D) Community

Which process do animals use to obtain energy from food?

A) Photosynthesis B) Fermentation C) Cellular respiration D) Nitrogen fixation

What term describes the role of a species in its ecosystem?

A) Niche B) Habit C) Structure D) Function

Which organ system is responsible for transporting oxygen and nutrients throughout the body?

A) Endocrine system B) Circulatory system C) Nervous system D) Respiratory system

What is the primary function of leaves in plants?

A) Absorption of water B) Photosynthesis C) Storage of energy D) Support

Which planet is known as the Red Planet?

A) Earth B) Mars C) Jupiter D) Venus

What is the term for a learned behavior that helps animals survive?

A) Instinct B) Conditioning C) Migration D) Adaptation

Which of the following is a renewable energy source?

A) Coal B) Natural gas C) Wind D) Oil

What is the main function of the skeletal system?

A) Movement B) Support and protection C) Blood production D) Hormone regulation

Which of the following is a primary consumer in a food chain?

A) Grass B) Rabbit C) Fox D) Hawk

What do we call a graphic representation of energy flow in an ecosystem?

A) Food chain B) Food web C) Energy pyramid D) Trophic level

Which term describes the gradual change in species over time?

A) Adaptation B) Evolution C) Speciation D) Extinction

Which layer of the Earth is liquid?

A) Crust B) Mantle C) Outer core D) Inner core

What is the primary cause of ocean currents?

A) Wind patterns B) Earth's rotation C) Differences in salinity D) Tides

What type of bond forms between water molecules?

A) Ionic bond B) Covalent bond C) Hydrogen bond D) Metallic bond

What is the main greenhouse gas responsible for climate change?

A) Oxygen B) Methane C) Carbon dioxide D) Nitrous oxide

Which of the following is not a type of rock?

A) Igneous B) Sedimentary C) Metamorphic D) Volcanic

What is the role of decomposers in an ecosystem?

A) Produce energy B) Consume primary producers C) Break down dead matter D) Provide nutrients to plants

What is genetic variation?

A) The same genes in all individuals B) Differences in DNA among individuals C) An identical offspring D) A mutated gene

Which type of energy transformation occurs in a hand-crank generator?

A) Chemical to thermal B) Kinetic to electrical C) Electrical to light D) Thermal to chemical

What is a biome?

A) A group of ecosystems with similar climate and vegetation B) A single ecosystem C) An individual species D) The atmosphere

Which scientist is known for the theory of natural selection?

A) Albert Einstein B) Charles Darwin C) Isaac Newton D) Gregor Mendel

What do we measure to determine the acidity or alkalinity of a solution?

A) Density B) Ph C) Salinity D) Temperature

Which type of organism is always at the top of a food chain?

A) Producer B) Primary consumer C) Secondary consumer D) Top predator

What is the term for an interaction between two different species in an ecosystem?

A) Competition B) Symbiosis C) Predation D) Parasitism

What is the primary function of the nervous system?

A) To protect against pathogens B) To control body movements C) To transmit electrical impulses D) To circulate blood

Which part of the cell is responsible for creating energy?

A) Nucleus B) Golgi apparatus C) Mitochondria D) Ribosomes