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Worksheets8th MOY (Middle of Year Practice)
Total questions: 40
Worksheet time: 2hrs 0mins
Four wooden blocks with masses of 2 kg, 5 kg, 7 kg, and 9 kg are placed on a table. According to Newton’s first law, which block will have the least inertia?
A The block with a mass of 2 kg
B The block with a mass of 5 kg
C The block with a mass of 7 kg
D The block with a mass of 9 kg
Study the distance-time graph in the diagram.
According to the graph, where does the object have the greatest speed?
1
2
3
4
What physical quantity of an object is also a measure of the same object’s inertia?
A density
B force
C mass
D volume
When Tina went for a walk, she covered the first 300 m in 100 s and the next 200 m in 150 s.What was Tina’s average speed?
A 1 m/s
B 2 m/s
C 3 m/s
D 5 m/s
A 10 N force and a 15 N force are acting on a box in opposite directions.
What additional force must be added to produce equilibrium?
A 5 N acting in the same direction as the 10 N force
B 5 N acting in the same direction as the 15 N force
C 10 N acting in the same direction as the 10 N force
D 25 N acting in the same direction as the 15 N force
Max is moving boxes in his house from one room to another. He finds it is easier to push theboxes across a wood floor than a carpeted floor.
Which factor best explains why it is easier to push the boxes along the wood floor?
A The wood floor has less friction.
B The wood floor has more gravity.
C The carpeted floor has less friction.
D The carpeted floor has more gravity.
The Earth’s tides are caused by
A The tilt of the Earth’s axis.
B The gravitational pull of the moon.
C The revolution of the Earth around the sun.
D Differences in wind speed around the Earth.
A student is riding his bicycle the 4 km to school from his house. The graph summarizes part of his trip over time.
If the student continues riding his bicycle at the same velocity, how much time will it take forhim to reach school?
A 12 minutes
B 15 minutes
C 20 minutes
D 25 minutes
The table shows some procedures from four different investigations (1, 2, 3, and 4).
Which procedure shows the importance of repetition during a scientific investigation?
1
2
3
4
Students in science class were asked to build a device that would protect an egg from a 9-m fallfrom a third-story classroom window. Students were asked by their science teacher to include alist of procedures including a few lab safety considerations.
Which statement is the most important safety consideration for this activity?
A Each team of students should be provided with the same building materials to complete the lab.
B Each team should ensure that the drop zone is free of people when the device is dropped.
C Each team should divide the tasks equally so each teammate is completing the same amount of work.
D Each team should require lab aprons when working on the construction of the device.
A student wants to know how marble mass affects velocity. The student rolls three differentmarbles down the same test track. The student records the data and calculates the marblevelocities in a table.
Which design problem reduces the validity of this experiment?
A The investigation had too many trials per marble.
B The velocity calculations are not accurate.
C The data is not presented clearly in the table.
D The investigation only had one trial per marble.
John released the same toy car down three ramps of the same lengths but different heights.He predicted and recorded the distance traveled by the toy car in a table.
After stating a conclusion for this experiment, John wanted to continue conducting experiments using toy cars. Based on this experiment, which scientific question would be a useful follow-upinvestigation?
A How does the ramp surface material affect the distance the toy car travels?
B How does the ramp height affect the distance the toy car travels?
C How do different colors painted on the same toy car affect the distance the toy car travels?
D How do different science classrooms with the same types of floor affect the distance the toy car travels?
An air track creates an almost frictionless surface over which a glider can slide freely. A scientist performed an experiment to determine if greater masses will cause different glideraccelerations. The scientist measured the acceleration by attaching a mass (X) to the glider andreleasing the mass, allowing it to fall freely and pull the glider away from the detector.
Which scenario describes a valid scientific investigation that the scientist could use to conductthe experiment?
A The scientist could conduct 5 trials each, measuring the acceleration of a 50-gram glider attached to a 50-gram mass, a 100-gram mass, and a 200-gram mass.
B The scientist could conduct 5 trials each, measuring the acceleration of a 50-gram glider, a 100-gramglider, and a 200-gram glider all attached to a 200-gram mass.
C The scientist could conduct 5 trials each, measuring the acceleration where the glider and mass Xboth have a mass of 50 grams, 100 grams, and 200 grams.
D The scientist could conduct 5 trials each, measuring the acceleration of a 50-gram glider attached to a 100-gram mass and averaging the results.
A researcher wants to design an activity to study how the weight of an object differs with a change in the strength of gravitational force. He plans to measure the weights of differentobjects in gravitational simulator rooms with different gravitational pulls.
Which step should the researcher include to design a controlled activity?
A Use two identical objects, and measure their weights in the same gravitational conditions.
B Use two different objects, and measure their weights in the same gravitational conditions.
C Use two identical objects, and measure their weights in different gravitational conditions.
D Use two different objects, and measure their weights in different gravitational conditions.
The length of a year on Earth is determined by
A The time it takes for Earth to make one rotation.
B The time it takes for the Sun to make one rotation.
C The time it takes for one revolution of Earth around the Sun.
D The time it takes for one revolution of the Sun around Earth.
Use the information to answer questions 16 and 17
Minerals containing various metals or carbonate compounds may produce bubbles of hydrogenor carbon dioxide gas when an acid is added. Other minerals may not react with acid at all. Totest the reactivity of five minerals, a group of students added five drops of acid to small samples of each mineral and recorded if any bubbles were observed.
What is one criticism of the experiment that would make the results more accurate?
A All minerals should have been tested with the same acid instead of three different acids.
B Fewer drops of acid should have been used to test the mineral samples.
C Fluorite should have been tested with either hydrochloric or nitric acid.
D Larger samples of the minerals should have been used instead of small samples.
Use the information to answer questions 16 and 17
Minerals containing various metals or carbonate compounds may produce bubbles of hydrogenor carbon dioxide gas when an acid is added. Other minerals may not react with acid at all. Totest the reactivity of five minerals, a group of students added five drops of acid to small samples of each mineral and recorded if any bubbles were observed.
A student in this lab group noticed that one mineral bubbled much more than the others.What question should the student use to develop a controlled follow-up experiment?
A How does the type and temperature of an acid affect the amount of gas produced from a sample of mineral in a chemical reaction?
B How does the type of container affect the amount of gas produced from a sample of mineral in a chemical reaction?
C How does the size of the rock particles and the type of acid affect the amount of gas producedfrom a sample of mineral in a chemical reaction?
D How does the type of acid affect the amount of gas produced from a sample of mineral in a chemicalreaction?
During a class activity, a teacher displayed the data from three seismograph stations (1, 2, and3) in the eastern United States that was used to locate the epicenter of a recent earthquake.
Which point on the map shows the epicenter of the earthquake?
A point P
B point Q
C point R
D point S
A teacher draws an image on the board that shows how forces build up as blocks of rock arepushed in opposite directions causing earthquakes. She marks three points (X, Y, and Z) onthe diagram.
What are the identities of the three points that the teacher marked?
A X: focus; Y: fault; Z: epicenter
B X: epicenter; Y: focus; Z: fault
C X: focus; Y: epicenter; Z: fault
D X: epicenter; Y: fault; Z: focus
Rock type K was formed by deposition and cementation of weathered minerals. This rock thenexperienced significant heat and pressure to form rock type L, which subsequently melted andcooled slowly to form rock type M.
What is the identity of rock type M?
A extrusive igneous
B intrusive igneous
C metamorphic
D sedimentary
A student is preparing a project on landforms formed by mountain-building forces. Which landform did the student incorrectly include in her project?
A fold mountains
B normal fault
C strike-slip fault
D volcanic vents
1. A team of geologists recorded a series of seismic waves resulting from earthquakes in the area.The geologists measured the wave speeds of four different seismic waves from four differentearthquakes and recorded them in the table.
Which wave corresponds to a primary wave?
W
X
Y
Z
Oil, natural gas, and coal resources are being depleted by humans. Which statement represents a disadvantage of using energy from fossil fuels?
A The formation of new fossil fuels will take a long time compared to how quickly it is now being consumed.
B The formation of new fossil fuels will take a short time compared to how slowly it is now beingconsumed.
C There is a surplus of renewable resources to use in place of fossil fuels.
D There is a shortage of renewable resources to use in place of fossil fuels.
During an earthquake, forces caused the rocks along a fault to pull in opposite directions. This tension caused the rocks at a weak point to break and release energy.
How did the energy flow to the surface?
A Energy flowed as heat waves from the focus to the surface.
B Energy flowed as vibrations from the epicenter to the surface.
C Energy flowed as seismic waves from the focus to the surface.
D Energy flowed as sound vibrations from the fault to the surface.
How do rock samples collected from the sea floor provide evidence of tectonic platemovement?
A Older rocks are found near the deep-ocean trenches.
B Older rocks are near the center of mid-ocean ridges.
C Younger rocks are near the deep-ocean trenches.
D Younger rocks are mixed with older rocks at mid-ocean ridges.
A teacher displayed a topographic map of an area with four points (P, Q, R, and S) marked onthe map.
Which point on the map represents a depression?
P
Q
R
S
The geologic cross section diagram shows undisturbed rock layers with index fossils from tworegions (A and B). The two index species are identified in the index fossil key.
Which answer option correctly describes the relative ages of the rock layers in the diagram?
Which length of geologic time is associated with the appearance of humans?
A Cambrian Period
B Cenozoic Era
C Mesozoic Era
D Precambrian Eon
A team of researchers discovered a trail of trace fossils of dinosaur tracks. The researchers hopeto learn more about the dinosaur that made the tracks by analyzing the fossils.
What can the researchers infer from the fossils discovered?
A The carbon imprint in the tracks can help reveal when the fossil was formed.
B The minerals in the tracks can be matched with bone records to identify the type of dinosaur.
C The distance between the tracks can help calculate how fast the dinosaur could walk.
D The fossil’s chemical composition can reveal the conditions in which the dinosaur lived.
What is an example of an adaptation in the owl that enables it to be a successful nighttimehunter?
A broad beak
B large eyes
C long tail
D short wings
With ancient history time lines, the phrase “Million years ago” is often abbreviated as “Ma,” asshown in the time line.
If a group of mollusks called ammonites became extinct about 68 million years ago, duringwhat period of geologic time did ammonites become extinct?
A Cenozoic
B Cretaceous
C Mesozoic
D Tertiary
Humans use large fishing nets that are over 50 meters wide to catch tons of fish from the oceans. What is an effect of these large fishing nets on non-target organisms?
A The non-target organisms migrate to freshwater ecosystems.
B Many non-target small organisms that escape the nets decrease in number.
C Many non-target organisms become endangered species because they get caught in the nets.
D The non-target organisms are unable to adapt when dumped back in the oceans.
What is one way volcanic eruptions can have an impact on the survival of organisms on Earth?
A Volcanic eruptions can add great amounts of oxygen to the air, allowing animal species to grow larger.
B Volcanic eruptions can create environmental conditions that favor cold-blooded animals.
C Volcanic eruptions can lead to a decreased ability of plants to perform photosynthesis.
D Volcanic eruptions can raise global temperatures, allowing flowering plants to bloom longer.
The image shows the unturned layers of sedimentary rocks with embedded fossils.
A student labels the fossils from 1 to 4. What could be true about the fossils?
A Fossil 1 is younger than fossil 2.
B Fossil 1 is older than fossil 4.
C Fossil 3 is older than fossil 2.
D Fossil 3 is younger than fossil 4.
What behavior of sound waves causes echoes?
A absorption
B reflection
C refraction
D transmission
Waves A and B can travel through a medium as well as through empty space. Wave C can onlytravel through a medium.
Which wave(s) can be electromagnetic?
A Wave B only
B Wave C only
C Waves A and B
D Waves A, B, and C
Study the wave.
What is the amplitude of the wave?
A 2 m
B 4 m
C 10 m
D 20 m
The gravitational pull on an object is measured as
A mass
B weight
C force
D gravity factor
What would be the color of a red flower viewed through a red filter?
A black
B blue
C green
D red
The characteristic of Earth MOST responsible for seasons is
A Earth’s gravitational pull on the moon
B Earth’s tilt on its axis
C Earth’s rotation
D Earth’s mass
