Science Quiz for Year 7: Life Science (7-LS1-6, 7-LS2-3)

Welcome to your science quiz! This quiz focuses on various concepts related to life science, specifically related to the structure and function of living systems and ecosystems. Answer each question by choosing the correct letter corresponding to your answer. Good luck!

Questions:

What is the main function of the respiratory system in humans?
- A. To digest food
- B. To circulate blood
- C. To take in oxygen and expel carbon dioxide
- D. To eliminate waste
Which organelle is responsible for energy production in animal cells?
- A. Nucleus
- B. Ribosome
- C. Mitochondria
- D. Golgi apparatus
Plants are primarily producers in an ecosystem. What process do they use to make their food?
- A. Cellular respiration
- B. Fermentation
- C. Photosynthesis
- D. Decomposition
What type of organism breaks down dead material and recycles nutrients back into the ecosystem?
- A. Producer
- B. Consumer
- C. Decomposer
- D. Predator
Which of the following is NOT a characteristic of living organisms?
- A. Growth and development
- B. Ability to reproduce
- C. Ability to move at will
- D. Response to stimuli
What part of a plant is primarily responsible for water absorption?
- A. Stem
- B. Leaves
- C. Roots
- D. Flowers
In an ecosystem, what do we call the role an organism plays within its environment?
- A. Habitat
- B. Niche
- C. Community
- D. Population
Which gas is essential for cellular respiration in animals?
- A. Nitrogen
- B. Oxygen
- C. Carbon dioxide
- D. Hydrogen
What is the primary source of energy for all living organisms on Earth?
- A. Wind
- B. Soil
- C. The Sun
- D. Water
In a food chain, what type of organism is typically at the second trophic level?
- A. Primary producer
- B. Primary consumer
- C. Secondary consumer
- D. Decomposer
Which of the following describes an ecosystem?
- A. A group of similar animals
- B. A community of organisms interacting with their environment
- C. A single organism
- D. The genetic makeup of a population
What is the process by which plants release water vapor into the atmosphere called?
- A. Evaporation
- B. Transpiration
- C. Condensation
- D. Precipitation
Which of the following best describes biodiversity?
- A. The number of individuals in a population
- B. The variety of life in a particular habitat or ecosystem
- C. The growth rate of an organism
- D. The competition for resources
What type of consumer feeds primarily on plants?
- A. Herbivore
- B. Carnivore
- C. Omnivore
- D. Scavenger
What is a symbiotic relationship in an ecosystem?
- A. A predator-prey interaction
- B. A relationship where both species benefit
- C. A competition between species for food
- D. A random occurrence
What cell structure controls what enters and exits the cell?
- A. Cell membrane
- B. Cell wall
- C. Cytoplasm
- D. Nucleus
What role do plants play in the carbon cycle?
- A. They produce carbon monoxide.
- B. They absorb oxygen.
- C. They release carbon dioxide.
- D. They absorb carbon dioxide and release oxygen.
Which type of organism is primarily responsible for nitrogen fixation in ecosystems?
- A. Plants
- B. Animals
- C. Bacteria
- D. Fungi
What is the function of chlorophyll in plants?
- A. To store energy
- B. To absorb sunlight for photosynthesis
- C. To transport nutrients
- D. To prevent disease
In what part of the cell does photosynthesis occur?
- A. Mitochondria
- B. Nucleus
- C. Chloroplasts
- D. Ribosomes
During an ecological succession, what is the first group of organisms that typically colonizes a newly disturbed area?
- A. Climax community
- B. Pioneer species
- C. Decomposers
- D. Primary consumers
Which type of consumer eats both plants and animals?
- A. Herbivore
- B. Carnivore
- C. Omnivore
- D. Decomposer
What is the relationship between predator and prey in an ecosystem?
- A. Both species benefit.
- B. The predator benefits at the expense of the prey.
- C. They compete for the same resources.
- D. They have no effect on each other.

Thank you for taking the quiz! Check your answers to see how well you understand the concepts related to life science!

What to create	Exam
Which subject	Science
What age group	Year or Grade 7
What topic	7-LS1-6 7-LS2-3
Question types	Close-ended
Number of questions	23
Number of answers	4
Correct answers	Exactly 1
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