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Worksheets8th Grade Science Midterm Cumulative Exam
Total questions: 17
Worksheet time: 51mins
(Std. 8-MS-PS1-1) Here are models of 3 different substances. They all have the same chemical formula of C5H12. How is it possible that they have the same formula, but are all different substances? (1 point)
The number of atoms is different.
The arrangement of the atoms is different.
The size and shape of the individual atoms.
There is no way this can occur.
(Std. 8-MS-PS1-1) Atomic models of graphite and diamond are shown.Graphite is a soft, dark material often used as a lubricant. Diamond is often a clear, hard crystal. Both materials are made of pure carbon.
Which of the following best explains the difference in these materials? (1 point)
The arrangement of the atoms of each one.
The elements of which each one is made.
The number of atoms each one is made of.
The size and shape of the individual atoms.
(Std. 8-MS-PS1-3) What is the difference between a natural and synthetic material? (1 point)
Natural material is made from chemicals and synthetic is made from nature
Natural material is made directly from nature and synthetic material is made from chemicals
Natural material is made from petroleum and synthetic material is made from wool
Natural material is made from trees and synthetic materials are made from plastics
(Std. 8-MS-PS1-3) Multiple Select: Read the following statements. Select each answer choice that is a true statement about synthetic materials. Please select 4 answers. (1 point)
Synthetic materials are made from natural resources
Synthetic materials are made by chemically changing natural resouces to create a material with different characteristics.
Some examples of synthetic materials are plastics, medicines, and new fuels.
A synthetic substance cannot be chemically identical to a naturally-occurring substance
Making and using synthetic materials have both positive and negative impacts on society.
(Std. 8-MS-PS1-3) Information on the raw materials required to produce four synthetic materials is provided. The production of which of the listed materials would require growing plants? (1 point)
Nylon fibers
Glass
Paper
Ceramic
(Std. 8-MS-PS1-6) Meals-ready-to-eat (MREs) are packaged meals that include their own disposable heat pack to warm the food. Students are challenged to duplicate MREs in the science classroom using chemical reactions. The final product must be safe and light.
Based on the observations, which chemical reaction would be the best choice for making a heat pack?
(1 point)
Chemical Reaction 1
Chemical Reaction 2
Chemical Reaction 3
Chemical Reaction 4
(Std. 8-MS-PS3-5) A graph showing the kinetic energy and mass of objects traveling at 10 m/s is shown.In order for an object moving at 10 m/s to have a kinetic energy of 1300 Joules, the object must have a mass in the range of–
(1 point)
0-10 kg.
10-20 kg.
20-30 kg.
30-40 kg.
(Std. 8-MS-PS3-5) A student creates a ramp by stacking four blocks and then leaning a meter stick against it. She releases four different balls from the same position on the ramp and calculates their speeds.
Based on the information in the table above, which ball would you predict to have the least kinetic energy when it reaches the end of the ramp? (1 point)
golf
tennis
baseball
softball
(Std. 8-MS-PS3-5) A diver standing on top of a diving platform that is 30 meters above the pool dives off the platform. Describe the transfer of energy that occurs during the fall. (1 point)
(Std. 8-MS-PS3-5) Steve, Mary, Annie, and James hit four identical tennis balls with a racket. The diagram below shows the top speed at which each tennis ball moved when it was hit.
Based on the diagram, which of the following is true about the tennis balls when they were at their top speed? (1 point)
James's ball had the most kinetic energy.
Steve's ball had the most kinetic energy.
Mary's ball had the most kinetic energy.
Annie's ball had the most kinetic energy.
(Std: 8-MS-PS3-3) How does removing thermal energy from water vapor affect the molecules in the gas? (1 point)
(Std: 8-MS-PS3-3) What happens to water molecules when a large quantity of thermal energy is added to water in the liquid state? (1 point)
The molecules gain kinetic energy, move farther apart, and become a gas.
The water molecules become packed closer together, and their temperature increases.
Each molecule gives up kinetic energy and eventually stops moving.
The more thermal energy added, the greater the attraction between molecules.
(Std: 8-MS-PS3-3) Thermal energy is removed from a sample of water vapor. Select ALL of the changes that will result from this change. (1 point)
The molecules will become more packed.
The temperature of the system will decrease.
The temperature of the system will increase.
The molecules of the system will lose kinetic energy.
The total energy in the system increases
(Std: 8-MS-PS3-3) John put a heat pack on his cold feet. What will most likely be the result? (1 point)
The cold from John’s feet will be radiated into the heat pack.
The warmth of the heat pack will be radiated onto John’s feet.
The cold from John’s feet will be conducted into the heat pack.
The warmth of the heat pack will be conducted onto John’s feet.
(Std: 8-MS-PS3-3) A crayon placed on a dark driveway in bright sunlight melted into a colorful puddle. What caused the crayon to melt? (1 point)
Solar radiation heated the driveway and then heat transferred to the crayon by conduction.
Solar radiation heated the driveway and then heat transferred to the crayon by radiation.
Solar convection heated the driveway and then heat transferred to the crayon by radiation.
Solar convection heated the driveway and then heat transferred to the crayon by conduction.
(Std. 8-MS-ESS1-4) Which of the following correctly lists the layers of rock in order from youngest to oldest? (1 point)
A, B, C, D, E
B, C, D, E, A
E, D, A, B, C
C, B, A, D, E
(Std. 8-MS-ESS1-4) The illustration below shows rock layers from three different locations and fossils the rock layers contain. The fossils are all trilobites, ancient organisms that were different over time.
Which conclusion can be drawn from the information in the illustration? (1 point)
The trilobite Asaphidae appeared first of those shown here.
The trilobite Auritimidae is the oldest of all the trilobites.
The trilobite Cyclopygidae appeared most recently of those shown here.
The trilobite Ceratopigidae appeared before all the others.
