Worksheets2nd Six Weeks Exam Review
Total questions: 15
Worksheet time: 30mins
The air friction acting on a baseball causes it to curve as it is pitched to the catcher. This is a result of -
Newton's 1st law
Newton's 2nd law
Newton's 3rd law
the Universal Law of Gravitation
As the roller coaster begins descending a hill as shown in the diagram, your body feels like it is being pushed hard into the back of your seat. Which of the following is the correct explanation for this sensation?
The roller coaster track applies a force on you that pushes you back into your seat as you go down the hill.
The force of gravity pulling you down makes you feel like you are being pushed into the back of your seat as the roller coaster accelerates down the hill.
As the roller coaster moves down the hill, it makes your body move with it and your body resists changing its motion which makes you feel like you’re being forced into your seat.
The roller coaster car you are in has more mass than you, so it moves faster down the hill, leaving you behind and pressing you into your seat.
Darius was walking from one class to the other during the passing period when he realized his shoes were untied. He stopped to tie his shoes and then glanced at the clock. The clock read 11:52 AM. He had to get to his classroom by 11:55 or he would be counted tardy to class. His class is 30 feet away. How fast will Darius have to move to make it to class on time?
10m/s
10 ft/min
10 ft/s^2
10 ft/min^2
A local school activity bus travels North to Denton to take students on a tour of the University of North Texas. The trip from the school to Denton is 66 kilometers. The bus travels for 56 minutes before it arrives at the UNT campus. Which of the following best represents the velocity of the bus for this campus visit trip?
1.18 km/min North
2.0 km/min South
1.2 km/hr
1.18 km/min
A high school baseball team in Dallas travels south to Austin to participate in a tournament. The trip from Dallas to Austin is about 322 kilometers. The trip requires about 3.5 hours to complete on a school bus. Which of the following best represents the VELOCITY of the bus?
92 km/h
92 km/h South
112.7 km/h
112.7 km/h South
When an object is acted on by unbalanced forces, the object will -
continue in the same direction
continue at the same speed
accelerate
come to a stop
When Trevor jumps to the dock from his small boat, the boat dips into the water. This is an example of -
Newton's 1st law
Newton's 2nd law
Newton's 3rd law
the Universal Law of Gravitation
A book is sliding across a horizontal tabletop. As it slides, slows down. Which of the following statements best explains this situation?
There is a balanced force on the book caused by gravity.
There is no upward force acting on the book.
There is an unbalanced force on the book caused by friction.
There are no unbalanced forces acting on the book.
Limestone is a common form of calcium carbonate. When limestone is subjected to high heat, it becomes calcium oxide and releases carbon dioxide gas. This change in limestone at a given temperature is an example of —
a physical change like the melting of ice
a chemical change like the rusting of iron
an igneous change like the melting of rock in a volcano
a reversible change such as hardening melted butter
11 A student mixes two solutions, planning to produce carbon dioxide. Which of the following is the BEST evidence that a chemical reaction is producing gaseous carbon dioxide?
color change
formation of a solid
temperature change
formation of bubbles
Drew added yeast and sugar to lukewarm water and placed it in a flask. He stretched a balloon over the opening of the flask. After several minutes, he noticed small bubbles rising along the side of the flask as the balloon slowly began to inflate. Drew concluded that —
A physical change was occurring.
The bubbles indicated a chemical change.
The water, sugar, and yeast were products of a chemical reaction.
The strong smell was evidence of a physical change.
Which of the following lists all the elements that are present in a molecule of sulfuric acid, H2SO4 ?
Hydrogen, Sulfur, and Oxygen
Hydrogen and Sulfur
Hydrogen and oxygen
Sulfur and Oxygen
Which of the following lists all the elements that are present in a molecule of potassium carbonate, K2CO3 ?
carbon and oxygen
phosphate and calcium
potassium, carbon, and oxygen
phosphorus, oxygen, and calcium
The chemical formula for glucose, a simple sugar, is C6H12O6 . The formula for ethanol, a fuel additive, is C2H6O . What accounts for the differences in these compounds?
The elements that make up glucose are different than the elements that make up ethanol.
The ratio of the elements is different in ethanol than in glucose.
The chemical properties of the elements that make up the compounds are different.
Glucose has more elements than the ethanol.
The picture above illustrates the horizontal forces acting on a car. The car’s engine force pushes forward, while friction between the tires and the road, along with wind resistance drag at the car in the backwards direction. Which of the following must be true about these forces if the car is driving forward on a level road at a constant speed of 45 miles per hour?
The force of the engine forward must be greater than the force of gravity acting on the car.
The force of the engine forward must be greater than the combined forces of friction
backward.
The force of the engine forward must be less than the combined forces of friction backward.
The force of the engine forward must be equal to the combined resistance forces.
