Answer the following question given this paragraph: Living things depend on catalysts to speed up many chemical reactions inside their cells. Catalysts in living things are called enzymes. Enzymes may be extremely effective. A reaction that takes a split second to occur with an enzyme might take billions of years without it!. Q: What speeds up chemical reactions inside cells? Choices: - nucleus - inhibitors - electrodes - catalysts A:
catalysts
Answer the following question given this paragraph: The volume of an irregularly shaped solid can be measured by the displacement method. You can read below how this method works. For a video on the displacement method, go to this URL: http://www. youtube. com/watch?v=e0geXKxeTn4 . Q: An solid object with an irregular shape can be measured via what method? Choices: - radiation - vibration - variation - displacement A:
displacement
Q: Answer the following question given this paragraph: The electrolysis of water produces hydrogen and oxygen gases. The electrolytic cell consists of a pair of platinum electrodes immersed in water containing a small amount of an electrolyte, such as H 2 SO 4 . The electrolyte is necessary because pure water does not contain enough ions to effectively conduct a current. At the anode, water is oxidized to oxygen gas and hydrogen ions. At the cathode, water is reduced to hydrogen gas and hydroxide ions. Q: The electrolysis of what substance produces hydrogen and oxygen gases Choices: - cholesterol - carbon dioxide - hydrocarbon - water A:
A: water
Question: Answer the following question given this paragraph: Sometimes deep ocean water rises to the surface. This is called upwelling . Figure below shows why it happens. Strong winds blow surface water away from shore. This allows deeper water to flow to the surface and take its place. Q: What is the name for the term that describes deep ocean water rising the surface? Choices: - percolating - leaking - up-rising - upwelling A:
Answer: upwelling
*Question*
Answer the following question given this paragraph: Freshwater biomes are defined by their low salt concentration, usually less than 1%. Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in areas of high salt concentration, such as the ocean. There are different types of freshwater biomes: ponds and lakes ( Figure below ), streams and rivers, and wetlands. Ponds and lakes range in size from just a few square meters to thousands of square kilometers. Streams and rivers are bodies of flowing water moving in one direction. They can be found everywhere. They get their starts at headwaters , which may be springs, melting snow, or even lakes, and then travel all the way to their mouths , emptying into another water channel or the ocean. Wetlands are areas of standing water that support aquatic plants. Wetlands include marshes, swamps, and bogs. Q: What are fresh water biomes defined by? Choices: - high salt content - moving water - animal species - low salt concentration A:
**Answer**
low salt concentration
Q: Answer the following question given this paragraph: All ecosystems need a constant input of energy in the form of sunlight or chemical compounds. Living things can be classified based on how they obtain energy as producers, consumers, or decomposers. Q: The energy for an ecosystem can come from sunlight or _________? Choices: - radiation compounds - fossil fuels - rain - chemical compounds A:
A: chemical compounds