Ques:Q: Why does a large log burn relatively slowly compared to the same mass of wood in the form of small twigs? Read this paragraph and choose the correct option from the provided answers: A large log placed in a fire will burn relatively slowly. If the same mass of wood were added to the fire in the form of small twigs, they would burn much more quickly. This is because the twigs provide a greater surface area than the log does. An increase in the surface area of a reactant increases the rate of a reaction. Surface area is larger when a given amount of a solid is present as smaller particles. A powdered reactant has a greater surface area than the same reactant as a solid chunk. In order to increase the surface area of a substance, it may be ground into smaller particles or dissolved into a liquid. In solution, the dissolved particles are separated from each other and will react more quickly with other reactants. Choices: - smaller blade area - larger surface area - larger surface area - smaller surface area A:

Ans:smaller surface area
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Ques:Q: What do ants and termites eat to help them digest wood and leaves? Read this paragraph and choose the correct option from the provided answers: Ants and termites grow fungi in underground "fungus gardens" that they create. When the ants or termites have eaten a big meal of wood or leaves, they also eat some fungi from their gardens. The fungi help them digest the wood or leaves. The fungi secrete certain enzymes that the ants or termites cannot produce on their own. Choices: - pollen - berries - yeast - fungi A:

Ans:fungi
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Ques:Q: What factor largely determines the distinguishing features of terrestrial biomes? Read this paragraph and choose the correct option from the provided answers: Terrestrial biomes include all the land areas on Earth where organisms live. The distinguishing features of terrestrial biomes are determined mainly by climate. Terrestrial biomes include tundras, temperate forests and grasslands, chaparral, temperate and tropical deserts, and tropical forests and grasslands. Choices: - density - sea level - migration - climate A:

Ans:climate
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Ques:Q: White blood cells called what travel to areas of the body that are inflamed? Read this paragraph and choose the correct option from the provided answers: White blood cells called phagocytes travel to areas of the body that are inflamed. Choices: - platelets - gametocytes - spirochetes - phagocytes A:

Ans:
phagocytes
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