Physical Science
What are balanced forces?
Forces that are equal in size and opposite in direction, resulting in no motion change.
What is one reason some animals form groups?
To help members survive by providing protection or finding food.
What can patterns in rock formations tell us?
They provide evidence for how landscapes change over time.
What causes day and night?
The rotation of Earth on its axis.
What are the two types of electric charges?
Positive and Negative
What happens when forces are unbalanced?
The object will accelerate in the direction of the stronger force.
What do all organisms have in common in their life cycles?
Birth, growth, reproduction, and death.
How do fossils help us understand Earth's history?
They show what types of organisms lived in the past and how they evolved.
Why does the Sun appear brighter than other stars?
Because it is much closer to Earth than other stars.
What do you need for a complete circuit?
A path for energy to flow from battery, through wires, to something to power (bulb, fan)
Describe an example of a physical change.
Melting ice, where the state changes but the substance remains water.
Give 3 external structures that could help an animal survive?
Example: Claws, Wings, Flippers, Gills, Fur
What does the geosphere consist of?
The solid parts of the Earth, including rocks and minerals.
Why do different constellations appear in the sky during different parts of the year?
The Earth’s orbit around the Sun.
What materials are good conductors of electricity?
metals like copper and aluminum
What is evidence that mixing two substances can create a new substance?
Observing gas bubbles, color change, or temperature change.
Give an example of a unique life cycle of an organism.
Frogs, which go through stages of egg, tadpole, and adult.
How does the atmosphere interact with the geosphere?
Wind can shape landscapes through weathering
How can shadows change throughout the day?
They change in length and direction based on the Sun's position
What are two methods to conserve freshwater?
Shorter showers, don't leave water running when washing dishes or brushing teeth, limit toilet flushing
Name 5 properties that we could use to describe an object
Color, Texture, Shape, State of Matter, Odor, Melting Point,
Why do plants primarily need air and water for growth?
They use these materials for photosynthesis and other vital processes.
How do humans affect the other spheres?
Biosphere: Hunt animals, cut down trees
Geosphere: Shapes landscapes to build roads, buildings, farms
Hydrosphere: Pollutes water, swims, boats
What is the relationship between a star's brightness and its distance from Earth?
The apparent brightness decreases as the distance increases.
Why is it important to do more than 1 trial during an investigation or experiment?
Data is more reliable and accurate with more trials. There may be a mistake or bias if there is only one trial.