1. Any human made object 2. Knowledge or skills to use an object. 3. A person or group of people working together.

Midterms Flashcards by Elizabeth W

Technology can be:

Any human made object
Knowledge or skills to use an object.
A person or group of people working together.

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What should always be represented on the x-axis of a line graph?

Independent variable

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In a controlled experiment, the ____________ is the observed condition that results from a change of the ____________.

Dependent variable

Independent variable

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Absolute zero is equal to ____.

0° K (kelvin)

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The amount of matter in an object is defined as_____.

Mass

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What is volume?

The amount of space occupied by an object.

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What is density?

The mass per unit volume of a material.

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On this scale, the freezing point of water is 0°.

Celsius

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What is Kelvin?

The SI unit for temperature.

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What is Fahrenheit?

The unit based roughly on the temperature of the human body.

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What is life science?

It deals with the science of living things.

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What is earth science?

It deals with Earth and space.

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What is physical science?

It deals with matter and energy.

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What is the control?

The standard by which test results can be compared.

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What is a pie graph used for?

To show how some fixed quantity is broken into parts.

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What is a bar graph used for?

We’re comparing information collected by counting.

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What is the metric system based on?

The metric system is based on multiples of 10.

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What is the SI unit for length?

Meters

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What is the SI unit for mass?

Kilograms

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What is the Law of Mass Conservation?

“In all physical and chemical change in matter is neither created nor destroyed. “

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What is the density of water?

1.0 g/ml

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Scientist learn about the natural world through investigations involving three things. What are they?

Observing
Experimenting
Building models

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List the six steps of the scientific method in order.

Ask a question
Gather data
Form a hypothesis
Test your hypothesis
Analyze data
Draw a conclusion

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What should you do if the hypothesis is proven correct?

Repeat step four several times.

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What do you do if the hypothesis was proven incorrect?

Go back to step three and make a new hypothesis.

When should you use a bar graph?

When you're dealing with counting.

When taking a quick look at my speedometer, I am reading the __________ speed.

Instantaneous

On a distance time-graph, what is always on the x-axis?

Time

What is a negative change in the rate of velocity?

- acceleration | - deceleration

If two vehicles are moving toward one another with equal velocity the one has greater momentum, and must also have greater _____.

Mass

The way motion is described relies heavily on what?

The reference point that is chosen.

What is displacement?

The distance and direction of an object's change in position.

What is motion?

A change in position relative to a reference point.

What is velocity?

Speed with direction.

What is acceleration?

The rate of change in velocity.

What is momentum?

The product of an object's mass times its velocity.

What is deceleration?

A negative change in rate of velocity.

What is speed?

The distance an object travels per unit of time

What is average speed?

The speed of motion one speed is changing.

According to Newton's second law, the acceleration of an object...

...is directly related to the force of the object.

The acceleration due to gravity is:

1. The same for all objects | 2. 9.8 m/s (squared)

The force acting to keep me from sliding off and on ramp as a round the curb in my van is…

Rolling friction

Movement typically occurs when the net force is…

Unbalanced

The force pulling me towards the center as a round that ramp is…

Centripetal force

What is inertia?

A resistance to change in motion.

When calculating that force, objects in the same direction can be _______ together.

Added

When adding balanced forces together, net force is ___.

The attraction between two objects is affected by the objects _____ and _______.

1. Mass | 2. Distance

My girl older stronger when there is _____________ pushing the objects together.

Force

The gravitational force (Fg) exerted on an object is that object's _______.

Weight

If I were on the moon, my ______ would change. My _____ would not.

1. Weight | 2. Mass

The inertia of an object is directly related to its _____.

Mass

A flat paper balls more slowly than about a paper because it has greater ____________.

Surface area

Which set of marbles, top or bottom, has a greater gravitational force between them? Why? ⚫️➡️ ⬅️⚫️ ⚫️➡️ ⬅️⚫️

The bottom set, because they are closer together.

Explain how oil decreases friction between two objects.

The oil fills in the spaces with prevents microwelds from forming.

Explain why astronauts feel "weightless"while in orbit flying around the earth.

Because they're in freefall.

What is terminal velocity?

The fastest rate that an object can fall.

Describe what occurs with the forces involved when an object reaches terminal velocity.

The force of gravity down is balanced by the air resistance up.

Explain each of Newton's three laws of motion.

1. An object in motion stays in motion and an object at rest stays at rest until acted on by an outside force. 2. F=ma 3. For every action there's an equal and opposite reaction.

Explain how the earth helps the moon to stay in orbit

Centripetal force holds the moon closer to the earth.

Explain why the water didn't come out of the cup while it was falling in our lab experiment.

Because the cup and the water are falling at the same rate.

What is energy?

1. The ability to cause change. | 2. The ability to do work.

What is kinetic energy?

The energy a moving object has because of its motion.

If the _________ of an object increases, it's GPE will _________.

Height, increase OR mass, increase

What is power?

The rate energy is converted.

Mechanical energy includes:

Kinetic

What is the law of energy conservation?

Matter/energy cannot be created or destroyed.

I plug in the Christmas tree and it aluminates my daughters' faces and warms their skin. List and describe three types of energy involved in this.

1. Electrical – it is plugged in. 2. Thermal – it warms their skin. 3. Fradian – it shines on their faces.

My car is sitting in the parking lot right now. Soon I will turn it on and drive it. The engine will be hot and the car will be moving. List and describe two types of energy involved in this.

1. Kinetic – it is moving. | 2. Thermal - it is hot.

What is a factor that did not change when other variables change?

Constant

Midterms Flashcards

(70 cards)