Gr 3 forces and structures
What is a force?
A push or a pull that can make an object start or stop moving.
What are three things that plants need to survive?
Air, water, space
What is a habitat? Name one
A habitat is a natural home or environment for a plant, animal, or organism. EX: rainforest
What is the speed of light?
a) 3 kilometres per second
b) 3000 kilometres per second
c) 30 000 centimetres per second
d) 300 000 kilometres per second
d) 300 000 kilometres per second
Which type of rock is most likely formed after a volcanic eruption?
a) Metamorphic
b) Sedimentary
c) Igneous
d) Gold
c) igneous
Tell me two natural structures
Nest, shell, tree
What is photosynthesis and why is it important?
Photosynthesis is the process that allows plants to make their own food. Plants need to make their own food in order to survive.
________________ is the study of the earth’s history based on fossils.
a) Psychology
b) Anthropology
c) Paleontology
d) Sociology
c) palenontology
What is the difference between a simple machine and
a complex machine?
A simple machine is a basic tool that helps apply force and do work. A complex machine is made up of two or more simple machines.
What part of a flower makes pollen?
Stamen
What is strength?
Ability to support a load
What do we call the layers of soil?
Horizons
List the three types of rocks.
Igneous
Sedimentary
Metamorphic
List 2 examples of things with pulley mechanisms.
Crane
Well
Elevator
b) List three examples of things with gear mechanisms.
Car
Clock
Bicycle
Which option is the best example of high friction?
a) Sliding down a slide
b) Car tires on a road
c) Walking in socks on a tile floor
d) Sledding down a snowy hill
b) Car tires on a road
What is fertlizer?
Used to help plants grow
List three reasons why habitats are important to humans:
Habitats are home to humans
Habitats are home to animals, which are important for food
Habitats have trees that keep our air clean
Name one thing that reflects light
Mirror, moon, cat's eyes
What is something that can protect a person from the impact of a force?
Seatbelt, helmet, elbow pads
What are the 5 forces?
Gravity, magnetism, friction, electrostatic, muscular
List 3 particles that make up soil
1. Sand. 2. Silt. 3. Clay
List 2 adaptations that help an animal survive in its habitat:
Sharp teeth - to eat meat
Long neck - to eat leaves off tree
White fur - to camouflage with snow
Gears are used to change what three things?
a) Inputs, outputs, and force
b) Pulleys, crowns, and torque
c) Acceleration, braking, and direction
d) Speed, direction, and torqued
d) Speed, direction, and torqued
Which describes when light passes through an object and bends.
a) absorption
b) reflection
c) refraction
c) refraction