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Question: Which organ is most responsible for oxygen entering the blood stream?
Answer: lungs |
Question: Why is a healthy diet important?
Answer: It supplies the body’s needs for growth and energy. |
Question: In the human body, the breaking down of food into simple substances occurs in the
Answer: digestive system. |
Question: Which of the following processes is an important part of star formation?
Answer: nuclear fusion |
Question: Carlos puts a new battery into a radio. What does the battery supply to the radio that makes it turn on?
Answer: electricity |
Question: What may form as a direct result of a star collapsing?
Answer: supernova |
Question: A shoe manufacturer randomly selects 10% of the production from each shift. Each of these shoes is checked to ensure that it is correctly made. What is this process called?
Answer: quality control |
Question: Some materials are electrical conductors. Which material best conducts electricity?
Answer: copper |
Question: Angela wants to report daily weather conditions. In which unit should Angela record the air temperature?
Answer: degrees Celsius |
Question: Which organisms use the energy from the remains of dead animals and recycle the nutrients back into the environment?
Answer: decomposers |
Question: Which is the first step in a design process?
Answer: Describe the problem. |
Question: What type of chemical reaction occurs when the body breaks down fats and sugars that supply it with energy?
Answer: exothermic |
Question: Intense heat and pressure in Earth's crust can change sandstone into quartzite. During this metamorphosis, many properties of these rocks change. Which property of these rocks will most likely remain the same?
Answer: mass |
Question: How do decomposers obtain their food?
Answer: absorbing food from dead organisms |
Question: A ball on a cart is moving at a rate of 2 m/s. The cart suddenly stops and the ball continues to travel in the same direction at the same speed. This is an example of the
Answer: first law of motion. |
Question: Why is it important to have a large sample size in an investigation?
Answer: to increase the validity of the data |
Question: Burt used a spoon to stir soup that was cooking on his stove. Which spoon will stay the coolest while he stirs?
Answer: a wooden spoon |
Question: Which is a distinction between an epidemic and a pandemic?
Answer: the geographical area affected |
Question: When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision?
Answer: sound |
Question: Which statement describes all matter?
Answer: All matter is made up of atoms. |
Question: Carbon dioxide is removed from Earth's atmosphere by
Answer: plant photosynthesis. |
Question: A water company uses lab tests on the water supply before sending the water through pipes to people's homes. How do these lab tests help people?
Answer: by checking the water to make sure it is safe to drink |
Question: What safety rule is most important for students to follow when working with acids and bases?
Answer: put on safety goggles |
Question: A person in a dark room looking through a window can clearly see a person outside in the daylight. But a person outside cannot see the person inside. Why does this happen?
Answer: There is not enough light being reflected off the person in the room. |
Question: Many processes on Earth occur at or near tectonic plate boundaries. Which geological events are most common along tectonic plate boundaries?
Answer: earthquakes and volcanoes |
Question: Two pool (billiard) balls collide, causing each to move in a different direction. Eventually, both come to a stop. The most important factor in causing them to stop is
Answer: friction. |
Question: Which of these provides the best evidence that the environment of Earth has changed over millions of years?
Answer: marine fossils found in mountains |
Question: Which physical characteristic do some organisms have that helps them survive in the Arctic?
Answer: changing fur color to hide from predators |
Question: Which of the following occurs during photosynthesis?
Answer: CO2 and H2O are converted to carbohydrates. |
Question: A common characteristic of all living things is that they
Answer: are made of cells. |
Question: In the solar system, moons orbit planets. Which of these do planets orbit?
Answer: the Sun |
Question: Visible light is which type of wave?
Answer: electromagnetic |
Question: In some national parks, controlled fires are maintained by firefighters. Which of these is one of the major reasons for using controlled burns to maintain certain ecosystems?
Answer: to rid the forest floor of accumulated deadwood and brush |
Question: Which of the following actions is most likely part of a test to find the hardness of a mineral sample?
Answer: scratching the sample with a nail |
Question: In Costa Rica a small tree, the acacia, provides shelter and food for ants. The ants protect the acacia by removing other insects and vines that might harm it. Which term best describes the relationship between the acacia and the ants?
Answer: mutualism |
Question: A car skids along the road and smoke appears to be coming from under the tires. The heat that produces the smoke is caused by
Answer: friction |
Question: A glacier sometimes leaves behind large chunks of ice. What is left in the ground when these chunks of ice melt?
Answer: a kettle |
Question: A student uses a high-efficiency gasoline lawnmower to cut grass. The term "high efficiency" is used to indicate that the lawnmower
Answer: uses less energy than other lawnmowers. |
Question: Which example would result in new cells that are most different from the parent cells?
Answer: sperm and egg cells uniting to produce fertilized egg cells |
Question: A dog gets the energy it needs to run from ___.
Answer: food |
Question: Certain flowers will open for twelve hours and then close. Which stimulus do the flowers respond to when they open and then when they close for that time period?
Answer: light levels |
Question: Smoking harms the body in many ways. It is most harmful to which organ?
Answer: lung |
Question: In 1609, Galileo Galilei used lenses to construct the first telescope. His telescope allowed him to observe many objects in space. His invention of the telescope and the data he gathered directly contributed to the understanding that
Answer: the planets revolve around the Sun. |
Question: The energy obtained from food is measured in units called
Answer: Calories |
Question: Which part of the body works closely with the digestive system to transport nutrients to the cells?
Answer: blood |
Question: An example of a learned behavior is
Answer: driving a car |
Question: Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?
Answer: Fe and O |
Question: When water evaporates from Earth's surface into the atmosphere, its molecules enter the gas state. What change in this gas causes molecules to condense into the small water droplets that form clouds?
Answer: The temperature is reduced. |
Question: Which process directly adds carbon into the atmosphere?
Answer: burning fossil fuels |
Question: Scientists think that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis?
Answer: They have similar anatomies. |
Question: A particular organism is able to survive in an environment due to a thick layer of fat beneath its skin. In which situation would the layer of fat most likely be a survival advantage?
Answer: swimming in arctic waters |
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