USA constitution
How many British colonies existed before the United States became independent?
13 colonies.
Who reached the Caribbean in 1492?
Christopher Columbus.
Which are the three types of angles?
Right, obtuse and acute
What is a community of living things interacting in a place called?
Ecosystem
What is the basic framework of the U.S. government?
The U.S Constitution
What is the Bill of Rights?
The first ten amendments to the Constitution
What were two things European explorers hoped to find?
New lands, trade routes, wealth, or knowledge.
Who discovered gravity?
Newton
Which ecosystem has many trees, shade, and rich soil?
A forest
Who were the Framers?
The delegates who helped write the Constitution.
What does the preamble explains?
The goals of the Constitution
Which explorer explored the Hudson River and Hudson Bay?
Henry Hudson.
An angle that is less that 90º is an...
Acute angle
Which ecosystem has wide open spaces, lots of grass, and few trees?
Grassland
What is the main source of energy plants use to make their food?
Who wrote the Federalist Papers?
Alexander Hamilton, James Madison, and John Jay.
Which explorer reached the Mississippi River during his exploration of the southeastern United States?
Hernando de Soto.
An angle that is 90º degrees is a...
Right angle
What is the main difference between an ocean and a lake?
Oceans are large bodies of salt water; lakes are bodies of water surrounded by land and are usually freshwater.
Which explorer searched for a Northwest Passage to Asia and explored the Hudson River and Hudson Bay?
Henry Hudson.
Where and when did the Constitutional Convention take place?
Philadelphia, in 1787.
Which explorer was the first European to see the Pacific Ocean from the Americas?
Vasco Núñez de Balboa.
Explain Newton's law
An object at rest stays at rest, and an object in motion stays in motion at a constant speed and in a straight line unless an external force acts on it.
What is chlorophyll?
The green pigment in plants that absorbs sunlight.
Name two reasons plants are important for life on Earth.
They provide oxygen, food, homes for animals, and help keep the planet healthy.