Problem:OPTIONS:
- mars robot
- mars driver
- mars SUV
- mars rover

Answer the following question given this paragraph: The Mars Rover pictured here is a wheeled robot developed by NASA. Its job is to explore the surface of Mars. The rover contains a lot of complex modern technology. But how it moves by rolling on wheels is a very old invention. The wheel was probably invented many times in different cultures, beginning at least 10,000 years ago. In addition to wheeled carts and chariots, early wheels were used for water wheels, grinding wheels, and wheels for spinning pottery. Wheels really changed human life. They revolutionized transportation and made it much easier to do many different kinds of work. Q: What is the wheeled robot developed by nasa to explore the surface of mars? A:
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A: mars rover

Problem:OPTIONS:
- practicum
- example
- variation
- experiment

Answer the following question given this paragraph: An experiment is a controlled scientific study of specific variables. A variable is a factor that can take on different values. Q: What is a controlled scientific study of specific variables called? A:
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A: experiment

Problem:OPTIONS:
- gradual weathering
- chemical breakdown
- rock weathering
- chemical weathering

Answer the following question given this paragraph: Chemical weathering is different than mechanical weathering. The minerals in the rock change their chemical makeup. They become a different type of mineral or even a different type of rock. Chemical weathering works through chemical reactions that change the rock. Q: What works through chemical reactions that change the rock? A:
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A: chemical weathering

Problem:OPTIONS:
- mineral
- compound
- particle
- cell

Answer the following question given this paragraph: The cell is the smallest unit of structure and function of all living organisms. Cell Biology focuses on significant aspects of the cell from its structure to its division. Some organisms contain just one cell, and others contain trillions. Some have a nucleus with DNA, others do not. Some have many organelles, others do not. But all cells are surrounded by a cell membrane. And it is this semipermeable membrane that determines what can enter and leave the cell. All cells need energy, and for many organisms, this energy comes from photosynthesis and cellular respiration. All cells come from preexisting cells through the process of cell division, which can produce a new prokaryotic organism. The cell cycle, which includes mitosis, defines the life of an eukaryotic cell. Q: The smallest unit of structure and function in all living organisms is what? A:
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A:
cell