Choose the letter of the correct answer.
Why does the Sun appear white at noon?
A. blue color is scattered the most
B. light is least scattered
C. red color is scattered the most
D. all the colors of the white light are scattered away
B. light is least scattered
C. red color is scattered the most
D. all the colors of the white light are scattered away
2. How ozone being a deadly poison can still perform an essential function for our environment?
A. It is a great source of solar energy.
B. It is a necessary component of carbon dioxide.
C. It protects life on Earth from the Sun’s ultraviolet (UV) radiation.
D. It is a source of Vitamin D.
3. This organ plays a big role in digestion because the enzymes it produced break down sugars, fats, and starches.
A. Liver
B. Gallbladder
C. Pancreas
D. Small intestine
4. Energy in the case of higher plants and animals is obtained by ________.
A. Breathing
B. Tissue respiration
C. Organ respiration
D. Digestion of food
5. Newton’s First Law of Motion states that objects in motion remain in motion unless acted upon by an outside force, and objects at rest stay at rest unless acted upon by an outside force. This statement is also referred to as the law of ________.
A. Force
B. Momentum
C. Friction
D. Inertia
6. Humans can breed plants and animals to have useful traits. By selecting which animals are allowed to reproduce, humans can influence an organism’s genotype. What name did Darwin use to describe this process?
A. Natural selection
B. Hybridism
C. Artificial selection
D. Survival of the fittest
7. The atomic number of a chemical element is equal to its _________.
A. protons
B. neutrons
C. mass
D. atoms
8. The symbiotic relationship in which both organisms benefit from the relationship.
A. Parasitism
B. Predation
C. Mutualism
D. Commensalism
9. What three things do plants need for the process of photosynthesis?
A. Sunlight, oxygen, and soil
B. Sunlight, carbon dioxide, and water
C. Sunlight, oxygen, and sugar
D. Sunlight, soil, and water
10. What layer of the Earth creates the magnetic field around the Earth?
A. Tectonic plates
B. Mantle
C. Outer core
D. Inner core
11. Which of the following best describes the Earth's inner core?
A. It is under such immense pressure that, even though it is very hot, it is still a solid.
B. The area of the Earth that is sometimes called the lithosphere
C. It consists of liquid iron and nickel.
D. The thinnest layer of the four layers that make up the composition of the Earth.
12. Volcanoes can be classified as dormant or active based on its _________.
A. age
B. shape
C. size of its crater
D. last eruption
13. Most of the liquid fresh water on Earth is stored underground in _____.
A. caves
B. estuaries and marshes
C. lakes
D. aquifers
14. Two objects on Earth are dropped from the top of a building that is 85 meters high. If Object A has a mass of 15 grams and Object B has a mass of 3 kilos, which object will hit the ground first, assuming there is no air resistance?
A. Object A
B. Object B
C. Both objects will hit the ground at the same time
D. Additional information is needed to determine the outcome
15. What is the role of DNA in a cell?
A. It is the building block for other molecules in the cell.
B. It provides the information to make proteins for the cell.
C. It provides energy to the cell.
D. It is responsible for the creation of cell membranes.
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