Earth’s Structure
What is the role of decomposers in an ecosystem?
A) Hunt other animals
B) Produce energy from sunlight
C) Break down dead matter and recycle nutrients
D) Store energy for consumers
Answer: C) Break down dead matter and recycle nutrients
What tool measures air temperature?
A) Barometer
B) Anemometer
C) Thermometer
D) Hygrometer
Answer: C) Thermometer
What celestial body do Earth and other planets orbit around?
A) The Moon
B) The Sun
C) Mars
D) A Black Hole
Answer: B) The Sun
Which body system controls your body's responses to stimuli?
A) Digestive system
B) Nervous system
C) Respiratory system
D) Circulatory system
Answer: B) Nervous system
What cell organelle is known as the "powerhouse" of the cell?
A) Nucleus
B) Ribosome
C) Mitochondria
D) Chloroplast
Answer: C) Mitochondria
What is the role of decomposers in an ecosystem?
A) Hunt other animals
B) Produce energy from sunlight
C) Break down dead matter and recycle nutrients
D) Store energy for consumers
Answer: C) Break down dead matter and recycle nutrients
What type of cloud often brings thunderstorms?
A) Stratus
B) Cirrus
C) Cumulonimbus
D) Cumulus
Answer: C) Cumulonimbus
What phase is the moon in when it looks completely dark?
A) Full Moon
B) Waxing Crescent
C) New Moon
D) Waning Gibbous Answer: C) New Moon
Answer: C) New Moon
What organ pumps blood throughout your body?
A) Brain
B) Lungs
C) Heart
D) Kidney
Answer: C) Heart
What green pigment is found in chloroplasts?
A) Hemoglobin
B) Chlorophyll
C) Melanin
D) Keratin
Answer: B) Chlorophyll
What is the path energy takes through a food chain called?
A) Energy flow
B) Food web
C) Habitat path
D) Life cycle
Answer: A) Energy flow
What is a front in weather terms?
A) A large storm system
B) A change in temperature during the day
C) The boundary between two air masses
D) A hole in the ozone layer
Answer: C) The boundary between two air masses
What force keeps planets in orbit?
A) Magnetism
B) Friction
C) Gravity
D) Solar Wind
Answer: C) Gravity
What gas do we breathe in that is necessary for respiration?
A) Carbon dioxide
B) Nitrogen
C) Oxygen
D) Hydrogen
Answer: C) Oxygen
What is the main product of photosynthesis?
A) Oxygen
B) Water
C) Carbon dioxide
D) Glucose
Answer: D) Glucose
What would happen to a food web if all the plants disappeared?
A) Only carnivores would survive
B) Herbivores and then carnivores would die off
C) New plants would quickly grow back
D) Decomposers would stop working
Answer: B) Herbivores and then carnivores would die off
What causes the seasons on Earth?
A) The distance between Earth and the Sun
B) The tilt of Earth's axis
C) Changes in the Sun’s size
D) Rotation of the Moon
Answer: B) The tilt of Earth's axis
Why do we have different seasons on Earth?
A) Earth moves closer and farther from the Sun.
B) Earth's axis is tilted.
C) The Sun's temperature changes.
D) The Moon blocks sunlight.
Answer: B) Earth's axis is tilted.
Name two body systems that work together when you run.
A) Nervous and digestive systems
B) Circulatory and muscular systems
C) Excretory and immune systems
D) Skeletal and integumentary systems
Answer: B) Circulatory and muscular systems
How does cellular respiration differ from photosynthesis?
A) Respiration builds glucose; photosynthesis breaks it down.
B) Respiration and photosynthesis do the same thing.
C) Respiration breaks down glucose for energy; photosynthesis builds glucose using sunlight.
D) Respiration uses sunlight to make food; photosynthesis releases energy from food.
Answer: C) Respiration breaks down glucose for energy; photosynthesis builds glucose using sunlight.
What term describes a living thing’s role in its environment?
A) Habitat
B) Niche
C) Ecosystem
D) Population
Answer: B) Niche
What is the difference between weather and climate?
A) Weather happens globally; climate happens locally.
B) Weather is short-term; climate is long-term patterns.
C) Weather is caused by the ocean; climate is caused by the land.
D) There is no difference between weather and climate.
Answer: B) Weather is short-term; climate is long-term patterns.
Name the order of the planets in our solar system starting closest to the Sun.
A) Earth, Mars, Jupiter, Venus, Mercury, Saturn, Uranus, Neptune
B) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
C) Mercury, Earth, Venus, Mars, Jupiter, Uranus, Saturn, Neptune
D) Venus, Mercury, Earth, Mars, Saturn, Jupiter, Uranus, Neptune
Answer: B) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What tiny air sacs in the lungs exchange oxygen and carbon dioxide?
A) Bronchi
B) Alveoli
C) Trachea
D) Capillaries
Answer: B) Alveoli
In which cell structure does photosynthesis occur?
A) Mitochondria
B) Nucleus
C) Chloroplast
D) Cell membrane
A new substance was created Paper burning Metal rusting melting crushing