Earth
The outermost layer of the Earth.
the crust
Friction
A connected group of food chains is a(n) ...
Food Web
An electrical component that close and break the circuit.
Switch
_________ is the movement of blood throughout the body
Blood Circulation
The center of the Earth.
the core
A freely suspended magnet always points in ____________ direction
North-South
Organisms that get energy by breaking down the remains of dead organisms are__________
Decomposer
An electric cell converts ,_________ energy into electrical energy.
________ is the natural process of sexual and physical maturation that occurs when a person's major organs and systems develop
Puberty
The layer of the Earth between the crust and the core.
the mantle
The substances which are strongly attracted by magnet are called __________.
magnetic substance
____________ are animals that feed on the bodies of dead animals.
scavengers
How many terminals does an electric cell has?
An electric cell have two terminals.
What is the biggest organ in the human body?
Skin
Large pieces of the lthosphere that move around on the Earth's surface.
tectonic plates
_________ a force that acts upwards on an object, opposite of gravitational force, on a floating object
Buoyant force or Buoyancy r
What is the scientific name of an organism that cannot make its own food?
Heterotroph
The circuit in which current can not flow is called _________
Open Circuit.
where the food is completely digested
Small intestine
Vibrations that move away from an earthquake.
seismic waves
What affects the strength of gravity between two objects?
Mass of object
Some beetles break down the remains of dead animals. Some mushrooms break down the remains of dead trees. These actions most benefit plants by what?
returning nutrients to the soil.
Both copper and silver are conductors of electricity but only copper is used for making electric wires and not silver. Why?
Silver is more expensive than copper
Why does the elphant only has 30 heart beat/minute while human has 70 heart beat/ minute?
Elephants have a slower heart rate than humans because of their large body size