Leap 2025 Review (Science-6th)

A sundial is made of two parts: a flat plate & a stick (gnomon). The dial is placed outside. The gnomon moves and tells time. Which phrase best explains how a sundial works.

• The pull of the Sun's gravity turns the dial.

• The Earth's gravity pulls the gnomon around the dial.

• As the Sin moves in the sky, the gnomon's shadow moves.

• The dial must be turned by hand during each position of the Sun

A solar flare is an increase of brightness on the Sun's surface. The flares produce large amounts of energy. The flares, if they are strong enough, can disturb Earth's atmosphere. The disturbance may disrupt radio communications and navigation systems. What would be a likely long-term consequence of severe solar flares?

• consistent disruptions of radio waves and navigation devices

• Severe storms would happen more frequently

• The Earth's temperature would increase further

• They would shut down communication systems

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS2-4

The planet Saturn has large rings composed of ice, water, & rocky material. Which phrase best explains the role of gravity in Saturn's rings? Select all that apply.

• Gravity keeps the rings from colliding with Saturn

• The gravitational pull captures debris for the rings

• The gravity from other planets is too weak to pull at the rings

• Gravitational pull from the sun prevents other planets from colliding with the rings.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Joe & Jim were riding a skateboard. To get themselves moving, they pushed against each other's hands. Instead of going forward, they each rolled backward. This was a demonstration of the principle of

• Ohm's Law

• Newton's 3rd Law

• relativity

• Newton's Law of Gravitation

Tags

NGSS.MS-PS2-1

Two football players collide on the field. One of them receives a concussion. Which one of Newton's laws applies the most here?

• 1st

• 2nd

• 3rd

• Universal Law of Gravity

Tags

NGSS.MS-PS2-1

The planets in the solar system s remain orbiting around the sun due to

• inertial forces

• electromagnetic forces

• gravitational forces

• solar winds

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Reid sets up a line of dominoes on a table. He pushes the first one in the row, which knocks the rest over. Which forces are used as the dominoes fall? Select all that apply.

• gravity

• applied force

• contact force

• Newton's 1st Law

A skate boarder was wearing a helmet to absorb the shock from the impact. How does the bike helmet work to absorb the force of the impact?

• The hard shell prevents impact

• The helmet spreads the force of the impact

• The helmet keeps the head from moving

• The helmet lessens the mass of the head

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS3-5

A discontinued satellite falls from orbit & hits the Earth. Which phrase best explains what happened to the satellite?

• The satellite likely hit a meteorite and fell to the Earth

• The satellite was magnetically drawn to the Earth's atmosphere

• The force of gravity caused the satellite to go into a free fall

• The satellite collided with space debris and fell to Earth

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Gravity is the force of attraction between any two objects that have mass. The gravitational force that a body exerts depends, in part, on its mass. Which of the following factors also affects the amount of gravitational force experienced between two bodies?

• the distance between the bodies

• the relative speed of the bodies

• the altitude of the bodies

• the angle of the bodies

Tags

NGSS.MS-PS2-4