science term 2

vocab?

which of the following objects do not allow heat or electricity to pass through.

rubber and wood

which of the following is the chemical name of H3PO4?

phosphoric acid

which of the following are the units of weight and force

newtons, pounds

the change of a substance from a liquid state to gaseous state is called

evaporator

which of the following are poor conductors of heat or thermal energy

wood and plastic

Thermal energy is transferred from the sun to the earth by

radiation

Small numbers within a chemical formula. They define the molecule and cannot be changed.

subscript

it is the device used to measure the temperature of substances or objects.

measuring cylinder

Devices which allow heat or electricity to pass through are called

conductors

it is the gravitational force on a body.

weight

which element is present in all acid

Hydrogen

The upward movement of warmer liquid gas os called

convection

devices which do not allow heat or electricity to pass through are called

insulators

the standard or SI unit of mass is called

kilograms

what is th constant value of the gravitational acceleration?

9.8m/s2

They are the substances on the left side of the chemical equation that react.

reactants

it means to make something, or to bring something into existence

create

what is the device used to measure the volume of liquid and irregular solids?

measuring cylinder

what are the forms of wasted energy.

sound and heat.

sublimation is the change of a substance from solid to gas without passing the liquid state. one example of sublimation is

dry ice

what is the divice used to measure the thermal energy of substances?

joule meter

compounds containing at least one oxygen atom and one other element is called

hydroxides

which method transfers thermal energy through a metal cooking pan?

conduction

It is a place where an energy change or transfer occurs

system

they are the substances on the right side of the chemical equation that were produced.

products

ternary compounds consist of three elements. what is the ternary compound

iron sulfate

what are good conductors of heat or thermal energy

silver and copper

what is the density of fresh water

1gram/cm3

its the rate of motion(how fast or slow an object moves) with reference to directions.

velocity

the numbers placed in front of a chemical formula to balance an equation. they can be changed.

coefficient

it is a form of energy that the system is designed to provide such as light from a bulb

useful output

the change solid to gas without passing the liquid state is called

sublimation

it is the enegry that comes out of a system

energy output

the change of a substance from gaseous state to liquid state

condensation

the ability of a liquid to evaporate easily such as alcohol or acetone is known as

volatility

a unit of used to measure the mass of very light objects such as a small amount of sugar or salt

gram

the amount of space occupied by matter is called

volume

the standard or SI unit of temperature is called

kelvin

The standard or SI unit of density is

kilograms/cu.meter

the standard or SI unit of volume is

cubic meter

compounds that are usually formed when a metal and a nonmetal combine is called

Ionic compound

when liquid water turns to gas, the water is said to

evaporate

the ratio of the mass per unit volume is known as

density

ionic compounds formed from the reactions of an acid and a base are Called

salt

thermal energy is transferred within metal by

conduction

what is the standard or SI unit of energy

joules

compounds that are usually formed by a combination of nonmetals ar called

covalent compounds