1.
What would be the best example of a body of water that contains saltwater?
Correct Answer
C. Pacific Ocean
Explanation
The Pacific Ocean is the best example of a body of water that contains saltwater. It is the largest and deepest ocean on Earth, covering more than 60 million square miles. The Pacific Ocean is known for its high salinity levels, which are caused by the accumulation of dissolved salts over time. It is home to a diverse range of marine life and plays a crucial role in regulating the Earth's climate.
2.
Which of these animals lives mostly in fresh water?
Correct Answer
D. Frog
Explanation
Frogs are the correct answer because they are amphibians that are commonly found in freshwater habitats such as ponds, lakes, and rivers. They have specialized adaptations that allow them to live both in water and on land. While jellyfish, whales, and sharks are all aquatic animals, they are primarily found in saltwater environments.
3.
What type of water is in lakes and rivers?
Correct Answer
A. Fresh
Explanation
Lakes and rivers contain fresh water. Fresh water refers to water that does not contain a significant amount of salt or other dissolved substances. It is typically found in lakes, rivers, and other bodies of water such as ponds and streams. Fresh water is essential for various purposes, including drinking, irrigation, and supporting aquatic ecosystems.
4.
What is the majority of Earth covered with?
Correct Answer
C. Water
Explanation
The majority of Earth is covered with water. Water covers about 71% of the Earth's surface and is found in oceans, seas, lakes, rivers, and underground. It plays a vital role in supporting life, regulating climate, and shaping the Earth's landscape through erosion and weathering.
5.
What are large frozen blocks of ice called usually found near the poles?
Correct Answer
A. Glaciers
Explanation
Glaciers are large frozen blocks of ice that are usually found near the poles. They are formed over long periods of time from compacted snow and ice, and they move very slowly due to their immense weight. Glaciers play a crucial role in shaping the landscape and are a major source of freshwater. Unlike icebergs, which are large chunks of ice that have broken off from glaciers and float in the ocean, glaciers are typically found on land. Ice cubes, on the other hand, are small pieces of ice used to cool beverages, and frozen water is a general term that refers to any water that has turned into ice.
6.
What of these materiales could NOT be recycled?
Correct Answer
E. Smelly trash
Explanation
Smelly trash cannot be recycled because it is not a material that can be processed and reused to create new products. Recycling typically involves collecting and sorting materials like glass, metal, paper, and plastic, which can be broken down and transformed into new items. Smelly trash, on the other hand, is likely to contain organic waste or other substances that cannot be recycled and may need to be disposed of in a different way, such as through composting or landfill.
7.
What is the Sun made of?
Correct Answer
C. Glowing gases
Explanation
The Sun is made up of glowing gases. The Sun is primarily composed of hydrogen (about 74% of its mass) and helium (about 24% of its mass). These gases undergo nuclear fusion in its core, which releases a tremendous amount of energy in the form of light and heat. This process is what makes the Sun shine and provides energy for life on Earth.
8.
Venus is the only planet to spin clockwise.
Correct Answer
A. True
Explanation
Venus is the only planet in our solar system that spins clockwise. Most planets, including Earth, rotate counterclockwise when viewed from above the North Pole. However, Venus has a unique rotation that goes in the opposite direction, making it the only planet to spin clockwise. This phenomenon is known as retrograde rotation and is believed to have been caused by a collision with a massive object in the past, altering Venus's rotation.
9.
The Earth is a giant magnet
Correct Answer
A. True
Explanation
The Earth is a giant magnet due to its magnetic field. This magnetic field is generated by the movement of molten iron in the Earth's outer core. The magnetic field extends from the Earth's interior into space and is responsible for various phenomena, such as the auroras and the alignment of compass needles. This magnetic field also protects the Earth from harmful solar radiation and plays a crucial role in maintaining the planet's atmosphere and climate.
10.
Stomach acid is strong but cannot dissolve steel.
Correct Answer
B. False
Explanation
Stomach acid is strong enough to dissolve stainless steel