Answer the following question given this paragraph: Producers create food energy. They are the base of all life on Earth. Most producers use photosynthesis but a very small number use chemosynthesis. Q: What is the sun classified as on the main sequence? Choices: - shrinking star - red dwarf - gas giant - yellow dwarf A:
yellow dwarf
(Question)
Answer the following question given this paragraph: Bioluminescent organisms include jellyfish and fireflies. Jellyfish give off visible light to startle predators. Fireflies give off visible light to attract mates. Q: What do jellyfish use to startle predators? Choices: - black light - bicellular light - harsh light - visible light A:
(Answer)
visible light
Ques: Answer the following question given this paragraph: The density of air varies from place to place. Air density depends on several factors. One is temperature. Like other materials, warm air is less dense than cool air. Since warmer molecules have more energy, they are more active. The molecules bounce off each other and spread apart. Another factor that affects the density of air is altitude. Q: Since warmer molecules have more energy, they are more what? Choices: - inactive - dense - abundant - active A:
Ans: active
(Q).
Answer the following question given this paragraph: The scientific method is employed by scientists around the world, but it is not always conducted in the order above. Sometimes, hypothesis are formulated before observations are collected; sometimes observations are made before hypothesis are created. Regardless, it is important that scientists record their procedures carefully, allowing others to reproduce and verify the experimental data and results. After many experiments provide results supporting a hypothesis, the hypothesis becomes a theory . Theories remain theories forever, and are constantly being retested with every experiment and observation. Theories can never become fact or law . Q: What does a hypothesis become after many experiments provide results supporting it? Choices: - a model - a fact - a study - a theory A:
(A).
a theory
Ques:Answer the following question given this paragraph: Wind blows small particles away. As a result, the ground surface gets lower and rockier; this is called deflation . The rocks that are left are called desert pavement . Desert pavement is a surface covered by gravel-sized particles that are not easily moved by wind. Q: What is the process by which wind blows to make the ground surface gets lower and rockier ? Choices: - inflation - stagnation - layering - deflation A:

Ans:deflation
Answer the following question given this paragraph: The arrow in Figure above shows that the reaction goes from left to right, from hydrogen and oxygen to water. The reaction can also go in the reverse direction. If an electric current passes through water, water molecules break down into molecules of hydrogen and oxygen. This reaction would be represented by a right-to-left arrow in Figure above . Q: If an electric current passes through water, water molecules break down into molecules of what? Choices: - carbon and oxygen - hydrogen and carbon - oxygen and methane - hydrogen and oxygen A:
hydrogen and oxygen