Nature of Science
Which of the following statements about science is true?
A. Science always contains the opinions of the investigator.!!
B. Science proves the predictions of scientists to be correct.!!
C. Science is based on observation or measurement that answers a question.!!
D. Science answers all questions using strict rules called the scientific method.!!
C. Science is based on observation or measurement that answers a question.!!
Which of the following best describes what clouds are made of?
A. fog that has risen from the ground!!
B. large amounts of water that has evaporated!!
C. water vapor that has condensed into droplets!!
D. rain or snow that has been pushed together by wind!!
C. water vapor that has condensed into droplets!!
Ashley is identifying insects and finds a Camo Moth. A Camo Moth looks like a leaf and is able to easily blend in with its surroundings. Which of the following is a result of this ability?
A. The Camo moth needs less food.!!
B. The Camo moth uses less energy.!!
C. The Camo moth has fewer offspring to care for.!!
D. The Camo moth has a greater chance of survival.
D. The Camo moth has a greater chance of survival.
Which of the following materials would be a poor conductor of electricity?
A. aluminum!!
B. copper!!
C. rubber!!
D. steel
C. rubber!!
Which of the following describes an example of a material undergoing a chemical change to become another material with different characteristics?!!
A. Iron turns to rust when it is exposed to oxygen.!!
B. When water boils, it turns into vapor, which is a gas.!!
C. Oxygen can become liquid at a very low temperature.!!
D. Gold can be spread out very thin to cover a large area!!
A. Iron turns to rust when it is exposed to oxygen.!!
Jane is investigating to find out if bean plants grow taller in ordinary topsoil or special potting soil over a three week period. She sets up her investigation with 10 bean plants of equal size in each type of soil. What should Jane do each day to make sure she gets valid results? !!
A. Water only the plants in special potting soil.!!
B. Calculate the average plant height for each soil type.!!
C. Move the plants in ordinary topsoil to different locations.!!
D. Estimate the height of each plant's stem and record the estimate!!
B. Calculate the average plant height for each soil type.!!
When comets come close to the Sun they develop a tail that glows so we can see it from Earth. Asteroids do not develop tails like this. In what other way are asteroids different from comets?
A. Asteroids orbit planets while comets orbit the Sun.!!
B. Asteroids are rocky while comets are balls of ice and dust.!!
C. Asteroids orbit outside of the Solar System while comets do not.!!
D. Asteroids are smooth and round while comets are lumpy shapes
B. Asteroids are rocky while comets are balls of ice and dust.!!
In what way are ferns different from flowering plants that produce seeds?
A. The stems of ferns are woodier than the stems of seed producing flowers.!!
B. Ferns spread by underground runners rather than scattering seeds from flowers.!!
C. The leaf of a fern does not include structures to move nutrients through the plant.!!
D. Ferns reproduce using spores rather than seeds produced by most flowering plants.!!
D. Ferns reproduce using spores rather than seeds produced by most flowering plants.!!
Magnets have a negative and positive pole. What happens if you try to touch the positive ends of two magnets together?
The positive poles will repel each other.!
Heat flows in which direction?
A. from solid objects to liquids!!
B. from larger objects to smaller objects!!
C. from warmer objects to cooler objects!!
D. from more dense objects to less dense objects
C. from warmer objects to cooler objects!!
Jonathan and Sarah have performed an experiment and are not sure their results are valid. What should they do to check their results?!!
repeat the same experiment
What makes up a galaxy?
gas, dust, and many stars
Many kinds of animals live in the Everglades, including alligators, Florida panthers, and manatees. What characteristic do all three of these animals of the Everglades share?
A. They all eat only fish.
B. They all have a backbone.
C. They all give birth to live young.
D. They all make their homes in the water.!
B. They all have a backbone. (Vertebrates)
Dan brought some chocolate chips in a plastic container with his lunch one day. He decided to save them and eat them while he waited for the bus after school. All afternoon his lunch bag sat on the warm windowsill in his classroom. When he finally took the container out after school, the chocolate chips had turned into a hard chunk of chocolate shaped like the bottom of the container. What happened to his chocolate chips?
A. They started as a solid, melted, and then became solid again.!!
B. They changed from a solid to a gas before becoming solid once again.!!!
C. They were a cool solid to start, then became a warm solid before cooling again.!!
D. They went from being a hard solid to a gas, a liquid, and then to a hard solid again.!!
A. They started as a solid, melted, and then became solid again.!!
Many rainforests are found in the tropics, but only a few are found in cooler temperate zones. What makes a forest a rainforest?
A. They always contain very large rivers or lakes.!!
B. They produce more oxygen than normal forests.!!
C. They have a canopy of trees and a great deal of precipitation.!!
D. They have a large variety of animals that are not found elsewhere.!
C. They have a canopy of trees and a great deal of precipitation.!!
Which of the following must be true for scientific results to be valid?
A. The results should be drawn in a graph.!!
B. The results should be based on evidence.!!
C. The results should support the ideas of other scientists.!!
D. The results should match the predictions of the scientist.!!
B. The results should be based on evidence.!!
Brandon has learned that many stars are actually larger than the Sun. If this is true, why do these stars appear like points of light in the sky?
These stars are farther away from Earth than the Sun is.!!
What is the purpose of the kidneys in the human body?
Kidneys help balance the salts and acids in the body by filtering blood.
Sam drops a sugar cube weighing one gram in a cup of cold water and lets it sit until the sugar cube dissolves. Malcolm adds one gram of powdered sugar to a cup of hot water and stirs it with a spoon. Rosa adds a one"gram packet of sugar granules to a cup of cold water and stirs it with a spoon. Angela adds a sugar crystal weighing one gram to a cup of hot water and does not stir it. Whose sugar is most likely to dissolve the fastest, and whose is slowest?
A. Malcolm's sugar dissolves fastest, and Sam's dissolves slowest.!!
B. Rosa's sugar dissolves fastest, and Malcolm's dissolves slowest.!!
C. Sam's sugar dissolves fastest, and Angela's dissolves slowest.!!
D. Angela's sugar dissolves fastest, and Rosa's dissolves slowest.!
A. Malcolm's sugar dissolves fastest, and Sam's dissolves slowest.!!
Padma took a bottle of water with her when she went to play soccer. She wanted to make sure none of it evaporated from the bottle while she was playing. What should she do to keep the water from evaporating?
A. Screw the top on loosely and set it in the Sun.!!
B. Put the top on tightly and leave it in the shade.!!
C. Leave the top off the bottle and set it in the Sun.!!
D. Screw the top on loosely and keep it in the shade.!
B. Put the top on tightly and leave it in the shade.!!
Ximena is an expert at blowing bubbles with bubble gum. She discovered that her bubbles were bigger if she stood facing the Sun when she blew them. At lunch she told her three best friends about her discovery and after school they all tried it. No one else was able to blow bigger bubbles when they faced toward the Sun. Which of the following would be best for Ximena to do next?!!
A. She should give them each bigger pieces of bubble gum and try it one more time.!!
B. She should prove she is right by blowing bubbles while her friends are watching.!!
C. She should ask her friends to try it again and concentrate harder when they face the Sun.!!
D. She should think about what else she is doing that might have made the bubbles bigger.!
D. She should think about what else she is doing that might have made the bubbles bigger.!
Bernie put some ice in a cup and poured some cold tea over the ice. He set the filled cup on the kitchen table. In a few minutes he noticed that there were drops of water all over the outside of the cup. Where did the drops of water most likely come from?
A. They evaporated out of the air above the cold liquid.!!
B. They condensed out of the air surrounding the cold cup.!!
C. They dripped off the ice cubes as he put them into the cup.!!
D. They came off his hands after holding the melting ice cubes.!!
B. They condensed out of the air surrounding the cold cup.!!
In the 1800s, the US military used horses to transport weapons and supplies through the American West. The dry, hot weather was difficult on the horses, and the terrain lacked the grass that horses fed on. In 1836, a US Army explorer recommended to the military that camels should be used instead. Why would camels be better to use than horses?
Camels are adapted to live in a hot, dry climate.
Solar power is a technology that relies on a renewable energy resource. Solar power changes energy from the Sun into a form of energy that can be used to heat our homes and run household appliances. What form of energy must solar energy be changed into in order to run household appliances?
electrical
Janna has offered her canary, Sammy, a choice of sunflower seed or ground corn for two months. She has observed that Sammy eats more sunflower seeds than ground corn during the two months. She concludes Sammy prefers sunflower seeds over ground corn. What should Janna do if she wants to confirm her results?
A. Repeat the experiment with her friend's bird.!!
B. Repeat the experiment using different food containers.!!
C. Repeat the experiment with the same exact conditions.!!
D. Repeat the experiment with another feed instead of corn.!!
C. Repeat the experiment with the same exact conditions.!!