Science Leap Review
Authored by Charles Martinez
Other Sciences
6th - 8th Grade
Used 1+ times
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17 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Use the information to answer the question.
Pierre wants to build a model of a ramp that would be safe for students who use wheelchairs. He knows that to be safe, a wheelchair ramp should not drop more than 10 centimeters for every 120 centimeters of ramp length. Pierre has the following materials:
• a ball that will roll the way a wheelchair rolls
• a stopwatch to time the ball as it rolls
• a board that can be used as a small ramp
• blocks of wood to prop up the board at different heights
• a meterstick to measure distance
Which items are necessary for Pierre to build a correct model of the ramp?
. the stopwatch and the ball only
the meterstick and the board only
. the meterstick, the board, and the blocks of wood only
the board, the blocks of wood, and the ball only
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these statements represents Mabel’s revised understanding of sunflower growth?Mabel read that regular heavy watering promotes growth in sunflower plants. She planted 6 plots of sunflowers with 5 plants each and watered each plot with a different amount of water. The table shows her results.
Plot Number Daily Amount of Water per Plant Average Final Height 1 1 liter 122 centimeters 2 2 liters 155 centimeters 3 3 liters 190 centimeters 4 4 liters 216 centimeters 5 5 liters 206 centimeters 6 6 liters 168 centimeters
Which of these statements represents Mabel’s revised understanding of sunflower growth?
.
Heavy watering on a regular schedule promotes sunflower growth.
Some plants respond better to watering, while
others respond better to light.
. Water promotes growth up to a point, beyond
which it stunts growth.
Some
sunflower plants need less water than others.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Joyce put 200 milliliters of water in a beaker, put a thermometer in it, and heated it until it started to boil. She recorded a temperature of 100ºC when it started to boil. She repeated the process with 400 milliliters of water. What would be the temperature when this second sample started to boil?
. twice as high as the first sample’s
slightly higher than the first sample’s
half as high as the first sample’s
the same as the first sample’s
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jo Anne took a large beaker of clean water and carefully added one drop of blue food coloring to the edge of the water’s surface. She did not touch or move the beaker. At first, she saw blue streaks as the food coloring sank into the water, but gradually the color of the entire beaker of water became evenly blue. What caused the blue food coloring to be mixed throughout the water?
Water molecules
hitting the food coloring molecules caused the mixing.
Light
shining on the surface of the water caused the mixing.
. A chemical reaction between the water and the food coloring formed a
new, light blue compound.
The
water interacted with the food coloring, causing the blue color to fade.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jerry threw a ball into the air. It followed a curved path and soon fell to the ground because
. air friction stopped the ball.
gravity
changed the ball’s direction
. the ball was not thrown hard enough
the
ball was not thrown straight up
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Denise was driving east over a hill in the afternoon, shortly after a rain shower. Suddenly the sun broke through the clouds, and she saw a rainbow ahead of her. Which of the following made the rainbow possible?
Sunlight can be separated into all the colors of the rainbow.
. Water reflects sunlight like a mirror to make
it look colored
Overhead
black clouds reflect in puddles to cause a mirage.
Air pollution causes the sky to look colored under these conditions.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement about plant and animal cells is true?
Both have a cell wall to give them support.
Both have a large vacuole to store water.
Both
use mitochondria to produce energy.
Both
use chloroplasts to store energy
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