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WorksheetsScience LEAP practice Session 3
Total questions: 20
Worksheet time: 11mins
Humans have 6 million smell receptors. Rabbits have 100 million smell receptors. Most dogs have 1 billion smell receptors. Using this information, which statement best explains why a dog's brain can process more information about smell than a rabbit's brain can?
Dogs take in different kinds of information with their smell receptors than rabbits do.
Dogs process information from their noses and tongues to learn about their surroundings.
Dogs have a smaller range of vision than rabbits do and learn to rely on their memories about smells.
Dogs take in more information because they have at least 10 times as many smell receptors as rabbits have.
Which statement best describes how a rabbit processes information that is taken in by the rabbit's eyes?
A rabbit's eyes send images to its brain so that the rabbit can see a place to hide.
A rabbit's eyes send signals to its muscles so that the rabbit can run from danger.
A rabbit's eyes send signals to its brain so that the rabbit can decide how to respond.
A rabbit's eyes send images to its ears and nose so that the rabbit can take in more information.
Which statement best describes how a rabbit knows whether it is in danger?
The rabbit's eyes recognize the shape of a predator.
The rabbit's brain compares memories to information from the environment.
The rabbit's ears and nose remember what a predator sounds and smells like.
The rabbit's brain combines visual, scent, and sound information into a complete image.
Some dog breeds hunt rabbits by sight. The rabbits see the dogs before the dogs get close to them. When the rabbits realize there is danger, they start running. The dogs chase after the moving rabbits. Which explains why dogs are able to hunt by sight and how rabbits can see the dogs before they get close?
Dogs have eyes that are facing forward which allow them to easily see and track rabbits.
Rabbits have eyes on the sides of their heads that give them a wider range of vision.
Dogs have eyes that face forward that allow them to easily see and follow rabbits. Rabbits have eyes on the sides of their heads that allow them to see the dogs before they get close to them.
Dogs use their great sense of smell to track the rabbits.
Ana strikes the flint hard with the steel rod and then strikes the same flint more gently. Jon notices that one strike is louder than the other. Which statement best explains why Jon hears a difference between the volume of the hard strike and the volume of the soft strike?
More energy is transferred from the objects to the air when two objects collide at a higher speed.
The flint transfers all the energy to the air in the hard strike.
The flint absorbs all the energy in the soft strike, so no energy is transferred to the air.
More energy is produced when a spark is created, causing more energy to be transferred to the air.
Ana strikes the flint hard with the steel rod. Which claim is best supported by the observation that a spark is produced when the flint is struck hard?
Energy is transferred to the flint.
Heat is transferred to the flint.
Matter is transferred to the flint.
Energy is transferred to Ana.
A spark is produced when the flint is struck hard by Ana with the steel rod. Which evidence best supports that energy has been transferred to the flint?
The flint gains mass.
Ana's hand develops a bruise.
Heat and light are created.
The flint is colder after it is struck.
Jon measured the air temperature around a rock before and after he struck it many times with the steel rod. The temperature before striking was 18 degrees Celsius, and the temperature after striking was 19 degrees Celsius. Which best explains why the temperature of the air increased?
Light energy from the Sun reflected off the steel rod.
Heat energy transferred to the surrounding air when the objects collided.
Motion energy stored in the rock was released into the air when the rock was hit.
Heat energy stored in the steel rod was released into the air after the rod hit the rock.
Jon and Ana investigate whether materials other than a steel rod and flint can be used to start a fire. They push a stick of wood against a groove in a board made of a softer wood. Which question could Jon and Ana investigate to determine whether this method can start a fire?
Does the stick absorb energy from the air to create a spark?
Does the stick create heat energy when it is pushed against the board?
Does the stick react with the oxygen in the air to create a spark?
Does the stick create heat and light energy when it first touches the board?
Which two pieces of evidence would support the claim that fire could be made by two materials that were being rubbed together?
the presence of sparks between the materials being rubbed together
a scent in the air that smells like wood
deep scratches being made on one of the materials
a temperature change in the air close to the materials
Rock layer X is made of rocks made of silt and salt, with fossils of fish. Rock layer Y is made of rocks made of salt. Rock layer Z is made of rocks made of silt, salt, and sand. Which statement best explains one of these layers of rock?
Layer Y was once lava.
Layer Z was once an ocean.
The top layer is older than the bottom layer.
Layer X was once under the ocean.
A teacher models how rainfall causes erosion on hillsides. She builds a hill made of clay soil and a hill made of loose loam soil. She pours water onto the top of each model hill. Which statement best explains the difference in erosion patterns?
Loose soil erodes faster because it absorbs more water.
Firm soil erodes more slowly because water flows into the soil more slowly.
Loose soil erodes faster because soil particles float on the surface of the water.
Firm soil erodes more slowly because it is difficult for water to break soil particles apart.
Which statement is true about the location of most mountain ranges?
Most mountain ranges are found along ocean and continent boundaries.
Most mountain ranges are found on islands.
Most mountain ranges are found where two oceans meet.
Most mountain ranges are found near the equator.
A seismometer is a device that measures and record the shaking of the ground during an earthquake. Which could be a reason why a seismometer reading would look different during different times of an earthquake?
The temperature of the ground was different during different times of the earthquake.
The angle of the ground was different at the beginning of the earthquake compared to the angle of the ground at the end.
The amount the ground moved was different during different parts of the earthquake.
The strength of the wind close to the ground was different during different parts of the earthquake.
Which best describes the relationship between a short-wavelength model and a long- wavelength model?
The amplitude of the long- wavelength is the same as the amplitude of the short-wavelength.
The amplitude of the long- wavelength is higher than the amplitude of the short-wavelength.
The amplitude of the long-wavelength is lower than the amplitude of the short-wavelength.
The amplitude of the long-wavelength is wider than the amplitude of the short-wavelength.
Joseph observed workers removing ivy from the brick wall of his school building. He found there were cracks and loose bricks after the ivy was removed. Which question should most likely be investigated to discover why the bricks changed after the ivy was removed?
Did the roots and leaves of the ivy dissolve the bricks?
Did the ivy leaves grow behind the bricks and push them outward?
Were the bricks loosened because the roots of the ivy grew in the cracks?
Were the bricks weakened in the winter because they were covered with frozen ivy?
Sharon found a data predicting about energy sources in 2040. The data included renewable and nonrenewable energy sources. Renewable sources include water, wind, and solar power. Nonrenewable include nuclear energy and fossil fuels such as coal and natural gas. The data source predicted that less energy would come from coal, about the same would come from nuclear power, more would come from renewables, and more energy would come from natural gas in the year 2040. Which 2 developments would most likely result from these predicted changes?
Fewer coal mines would be opened.
Electricity use would drop over the years.
All fossil fuels would decrease in use.
There would be greater use of solar and wind power.
Aiden released a toy car from different points on a ramp. He used a sensor to measure the speed of the car once it reached the bottom of the ramp. Point 1 was at the top of the ramp, point 2 was a little lower down the ramp, followed by points 3 and 4 each being lower down the ramp. Aiden concluded that the car had the most energy when it was released from point 1. Which evidence did Aiden most likely use to reach his conclusion?
Point 1 was the farthest from the sensor.
Point 1 is closest to the top of the ramp.
The car took the most time to reach the end of the ramp from point 1.
The car had the greatest speed at the sensor when it was released from point 1.
Some car side mirrors have a small extra mirror. This extra mirror is circular and curved like a dome. Which 2 statements best explain how the small curved mirror helps a driver see objects near the car?
Light from beside the car reflects into the driver's eyes.
Light from many directions reflects into the driver's eyes.
Light from the car's other mirrors reflects into the driver's eyes.
The driver can see objects in many places near the car.
What can be discovered by studying rock layers?
what environment was in an area at different time periods
what animals lived in an area at different times
how areas changed over time
All of these can be found by studying rock layers.
