why does a persons heart rate increase during exercise?
More oxygen is needed
100
What is Mechanical energy?
Mechanical energy is present in any object that is moving or has the potential to move.
100
What is an Atom?
Fundamental units of matter.
100
What makes up the atmosphere?
A mixture of gases.
100
What is an Allele?
Different forms of genes.
200
On the way to the lungs, air passes through?
The Trachea
200
What is potential energy?
Potential energy is stored energy that an object has because of its position or chemical makeup.
200
What is the difference between an element and a compound?
Element- one kind of atom; compoun-2 or more kinds of atoms.
200
How is earths crust related to its lithosphere?
The crust is the solid outer layers of the lithosphere.
200
What is the relationship between a gene and a trait?
A gene determines the trait an organism will have.
300
Why would people become very sick if their kidneys stopped functioning properly?
If a persons kidneys stopped working, the persons blood would fill up with waste and become toxic.
300
What has a greater kinetic energy a car going 30 mph or one going 40 mph?
Because kinetic energy increases as speed increases, the car going 40 mph has more kinetic energy.
300
What is Metaloid?
Elements having properties of both metals and non metals
300
What gases make up the earths atmosphere? which are more abundant?
Nitrogen, oxygen, carbon dioxide, water vapor and trace gases make up earths atmosphere. Nitrogen and oxygen are most abundant.
300
Which number is closest to the number of different genes in a human body?
40,000 different genes.
400
What is the role of the exretory system.
To eliminate wastes
400
When does the potential energy of a roller coaster become kinetic energy?
When it goes down hill.
400
What are two properties of metal?
Shiny; good conductors of heat and electricity.
400
Although it is hot, the inner core is solid metal why?
The inner core is under tremendous pressure, making it solid.
400
What is How many pairs of chromosomes are there in most human cell?
There are 23 pairs of chromosomes.
500
Both mechanical and chemical digestion occur in the?
Stomach
500
Can sound be described as kinetic energy?
Yes sound can be described as kinetic energy because sound waves move, molecules vibrate as sound travels through matter in waves.
500
How does the total number of elements compare to the total number of compounds?
THERE ARE LITTLE MORE THAN 100 ELEMENTS BUT THERE ARE MILLIONS OF KNOWN COMPOUNDS
500
What causes the crust to move?
The mantle is partly liquid, partly flexible. the outer core is made of melted rock called magma. the inner core at the planets center is a high density sphere of solid metal.