Earth Systems
Which "sphere" contains all the water on Earth, including ice and oceans?
A. Geosphere, B. Biosphere, C. Hydrosphere, D. Atmosphere
C. Hydrosphere
What time is the term for anything that has mass and takes up space?
A. Energy, B. Matter, C. Force, D. Weight
B. Matter
An organism that makes its own food using energy from the Sun is a:
A. Consumer, B. Producer, C. Decomposer, D. Predator
B. Producer
Which forces keeps the planets in orbit and pulls objects toward Earth?
A. Magnetism, B. Gravity, C. Friction, D. Electricity
B. Gravity
Where is the most of Earth's freshwater stored?
A. Ocenas, B. Glaciers and Ice Caps, C. Lakes, D. Clouds
B. Glaciers and Ice Caps
If you stir sugar into tea until it is no longer visible, the sugar has:
A. Melted, B. Evaporated, C. Dissolved, D. Condensed
C. Dissolved
What is the primary role of decomposers (like fungi) in an ecosystem?
A. To hunt prey, B. To recycle nutrients, C. To make oxygen, D. To provide shade
B. To recycle nutrients
Why does the Sun appear so much brighter than other stars?
A. It is the biggest star, B. It is hotter than all others, C. It is much closer to Earth, D. It is made of different gas
C. It is much closer to Earth
What is it called when plants release water vapor into the air?
A. Condensation, B. Precipitation, C. Transpiration, D. Runoff
C. Transpiration
According to the Law of Conservation of Mass, if you melt 50g of ice, the liquid water will weight:
A. 25g, B. 50g, C. 100g, D. 0g
B. 50g
What is the original source of energy for nearly all food webs?
A. Soil, B. Water, C. The Sun, D. Carbon dioxide
C. The Sun
Earth rotating on its axis once every 24 hours causes:
A. The seasons, B. Day and night, C. Tides, D. Eclipses
B. Day and night
Which two spheres are interacting when a river (water) carves a canyon into rock?
A. Atmosphere and Biosphere, B. Hydrosphere and Geosphere, C. Biosphere and Geosphere, D. Atmosphere and Hydrosphere
B. Hydrosphere and Geosphere
Which of the following is an example of a chemical change?
A. Freezing water, B. Cutting paper, C. Burning wood, D. Mixing salt and sand
C. Burning wood
How does energy move through an ecosystem?
A. Form decomposers to producers, B. From producers to consumers, C. From predators to plants, D. From the moon to the ocean
B. From producers to consumers
We see different constellations during different parts of the year because:
A. The stars are moving, B. Earth orbits the Sun, C. The Sun orbits Earth, D. The Moon blocks the stars
B. Earth orbits the Sun
About what percentage of Earth's water is salt water?
A. 50%, B. 75%, C. 97%, D 3%
C. 97%
Which is a common sign that a chemical reaction has occurred?
A. The shape changed, B. It got smaller, C. Bubbles or gas formed, D. It moved
C. Bubbles or gas formed
Scientific evidence shows that plants get the material they need for growth mainly from:
A. Air and water, B. Soil and fertilizer, C. Rocks and minerals, D. Insects
A. Air and water
If your shadow is very short, where is the Sun most likely located?
A. Rising in the East, B. Setting in the West, C. High in the sky (noon), D. Below the horizon
C. High in the sky (noon)