Science 1
Science 2
Science 3
Science 4
Science 5
100
Which of the following statements best describes a complex machine? a) it is designed to move with a motor b) it is constructed from machine-made parts c) it is made of more than one simple machine d) it is built from more than one type of material
What is "c" it is made of more than one type of simple machine
100
The sun is the largest body in the solar system. The sun is a) a moon b) a planet c) satellite d) star
What is "d" a star
100
Which of the following best describes a mineral? a) the main nutrient in all foods b) a type of grain found in cereals c) a natural substance that makes up rocks d) the decomposed plant matter found in soil
What is "c" a natural substance that makes up rocks
100
Which of the following properties best describes a materials ability to resist scratching? a) weight b) flexibility c) length d) hardness
What is "d" hardness
100
The sun appears to move across the sky each day, rising in the east and setting in the west. What causes this apparent motion? a) the rotation of Earth on its axis b) the revolution of the Sun around Earth c) the Earth's distance from the sun d) the properties of Eath's atmosphere
What is "a" the rotation of Earth on its axis
200
A student places a sheet of black construction paper on her desk. What happens to most of the light that strikes the black construction paper? a) the light is bent by the paper b) the light reflects off the paper c) the light is absorbed by the paper d) the light passes through the paper
What is "c" the light is absorbed by the paper
200
John has two bar magnets. He pushes the ends of the two magnets together and then he lets go. The magnets move quickly apart. Which of the following statements best explains why this happens? a) the north poles of the two magnets are facing each other b) one magnet is a north pole and one magnet is a south pole c) the ends of magnets repel each other but the centers attract d) one magnet is storing energy and one magnet is relesing energy
What is "a" the north poles of the two magnets are facing each other
200
The purpose of thorns on a plant is most likely to a) help the plant to get moisture b) anchor the plant in the ground c) protect the plant from harm d) support the stems and branches
What is "c" protect the plant from harm
200
When a light bulb is turned on, energy changes from one form to another. Which of the following best describes this change? a) sound energy to light energy b) nucleur enerty to light energy c) electrical energy to light energy d) magnetic energy to light energy
What is "c" electrical energy to light energy
200
Which of the following forms of energy can travel by vibrating particles of air? a) electrical b) light c) magnetic d) sound
What is "d" sound
300
Which of the following is the best example of instinctive behavior in an animal? a) A dog sits when told to sit by its owner b) A bird avoids an insect that has a bad taste. c) A newly hatched sea turtle walks toward the ocean. d) A chimpanzee uses a stick to pull termites from a tree stump.
What is "c" A newly hatched sea turtle walks toward the ocean
300
Which of the following characteristics is a lion least likely to pass on to its offspring? a) colors of its fur b) length of its tail c) scars on its leg d) size of its body
What is "c" scars on its leg
300
Which habitat on Earth would probably add the greatest amount of water to the water-cycle through evaporation? a) cold lake b) desert sand c) warm ocean d) mountain rock
What is "c" warm ocean
300
Steel cans are separated from aluminum cans in a recycling center. Which of the following is the best way the recycling center can separate the steel cans from the aluminum cans? a) sort the cans by size b) put the cans in water c) cool the cans to a low temperature d) put the cans under an electromagnet
What is "d" put the cans under an electromagnet
300
What happens to the path of a light ray as it passes from air into water at an angle? a) Its path widens b) Its path bends c) Its path becomes shorter d) Its path continues in a straight line
What is "b" Its path bends
400
Which of the following climates has cold winters and hot summers? a) polar b) subtropical c) temperate d) tropical
What is "c" temperate
400
Lisa put a container of water in the freezer and left it there overnight. The next morning she saw that the water in the container had changed to ice. Which of the following statements best explains why the water changed to ice? a) the water gained energy b) the water absorbed light c) mass was released from the water d) heat was taken away from the water
What is "d" heat was taken away from the water
400
Which of the following statements best describes sandy soils? a) Sandy soils allow water to drain quickly b) Sandy soils easily break down into clay sediments c) Sandy soils hold plant roots tightly in place to prevent erosion d) Sandy soils have high levels of decomposed plant and animal matter
What is "a" Sandy soils allow water to drain quickly
400
When a volcano erupts, lava flows out from the top. What type of rock is formed as the lava cools? a) magma b) igneous c) sedimentary d) metamorphic
What is "b" igneous
400
Which of the following was probably most important in the formation of dark, fertile soil that is good for farming? a) plant decomposition b) radioactive decay c) water erosion d) wind erosion
What is "a" plant decomposition
500
Which of the following animals goes through a metamorphosis? a) alligator b) frog c) lizard d) turtle
What is "b" frog
500
In a city near the ocean, fog often forms on summer mornings. Which of the following statements best explains how this fog forms? a) Ocean water evaporates and then condenses in the air b) Crashing waves spray tiny drops of ocean water into the air c) Water runoff moves toward the ocean and collects near the shore d) Rain clouds move in from the ocean and evaporate as they reach the shore.
What is "a" Ocean water evaporates and then condenses in the air
500
Which of the following can be caused by weathering? a) cracks forming in a boulder b) rocks melting to form magma c) glaciers forming on a mountainside. d) pebbles combining to form a large rock
What is "a" cracks forming in a boulder
500
Which part of a plant is most responsible for using energy from the Sun to produce food for the plant? a) flower b) leaf c) root d) stem
What is "b" leaf
500
Which of the following processes makes it possible for plants to use energy from sunlight to produce their own food? a) metamorphosis b) photosynthesis c) pollination d) reproduction
What is "b" photosynthesis
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