Unit 3 Biolite

Front

How does the total energy in the popcorn-popping system change when popcorn pops?

Back

Total energy will remain the same when popcorn is popped, but some will be transformed.

Answer explanation

When popcorn pops, the total energy in the system remains constant due to the law of conservation of energy. However, the energy transforms from thermal energy to kinetic energy, causing the popping sound.

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

Front

Energy transformation when a lamp is plugged into a socket.

Back

Electrical energy changes into light energy.

Answer explanation

When a lamp is plugged in, electrical energy from the socket is converted into light energy, which is emitted as the lamp illuminates. Therefore, the correct choice is C.

Tags

NGSS.HS-PS3-3

Front

Which of the following statements best describes the energy transformation that occurs when a log burns?

Back

Chemical energy changes to thermal energy and light energy

Answer explanation

When a log burns, the stored chemical energy in the wood is transformed into thermal energy (heat) and light energy, making the correct choice: 'Chemical energy changes to thermal energy and light energy'.

Tags

NGSS.HS-PS1-4

Front

What happens to the kinetic energy and gravitational potential energy of a ball during free fall?

Back

Gravitational potential energy decreases, and kinetic energy increases.

Answer explanation

During free fall, a ball loses gravitational potential energy as it descends, which is converted into kinetic energy. Thus, gravitational potential energy decreases while kinetic energy increases.

Front

Based on the data in Data Set 1, what was the temperature (°C) of the control group at 60 seconds?

Back

-2

Answer explanation

The control group's temperature at 60 minutes was recorded as -2°C in Data Set 1, making option A the correct choice.

Front

In Data Set 2, at what time did the experimental group reach a temperature of 15°C? Options: 10:00 AM, 11:30 AM, 1:00 PM, 2:30 PM

Back

11:30 AM

Answer explanation

In Data Set 2, the experimental group reached 15°C at 11:30 AM, as indicated by the recorded temperature data. This time is confirmed by the data points leading up to that temperature.

Tags

NGSS.HS-PS3-4

Front

At what temperature did the ice cream begin melting?

Back

2°C

Answer explanation

The ice cream began melting at 2°C, as this is the temperature where the solid state transitions to liquid. Temperatures below this point, such as 0°C, do not cause melting.

Tags

NGSS.HS-PS3-4

Front

What type of energy does a moving car possess?

Back

Mechanical Energy

Answer explanation

The moving car possesses mechanical energy, which is the energy of motion. This energy is a result of the car's speed and mass, distinguishing it from other types of energy like electrical or chemical.

Front

How do windmills convert the kinetic energy of the wind into electrical energy?

Back

By using blades to capture wind energy and convert it into mechanical energy, which is then transformed into electrical energy by a generator.

Answer explanation

Windmills convert wind's kinetic energy into mechanical energy using blades. This mechanical energy is then transformed into electrical energy by a generator, making this the correct process for generating electricity from wind.

Tags

NGSS.HS-PS3-3

Front

When electricity passes through a light bulb, it is converted to _______________________.

Back

light energy

Answer explanation

When electricity flows through a light bulb, it is converted into light energy, which is the primary function of the bulb. Other forms of energy like motion or static electricity are not produced in this process.

Tags

NGSS.HS-PS3-3