Science Test

water displacement for small irregularly shaped objects procedure

1. fill some water into the graduated cylinder 2. Record the volume of the water 3. Carefully place the object in the cylinder 4. Record the final measurement 5. then subtract the two to find the volume of the object.

measuring volume directly- procedure

1. fill the graduated cylinder with the desired liquid. 2.Then bend down at eye level and read from the bottom of the meniscus.

water displacement for large irregularly shaped objects procedure

1. fill the overflow can high to the spout 2. let the water drain out 3. After the water drains out hold a graduated cylinder underneath the spout 4. Then place the object in the cylinder and wait till the water drops into the graduated cylinder. 5. The graduated cylinder's water will be the volume of the object. Object- overflow can and graduated cylinder.

measuring volume of regular solid procedures

1. place the solid on the table 2. Measure the length, width, and height 3. multiply them all together. objects- used metric ruler

Measuring mass directly procedure

1.move all riders to zero and adjust the counter weight. 2.put the object on the scale and let it settle. Move the 100 gram and 10 gram, for each one until the arm drops below the line. 3. Determine the weight needed by the 1 gram by sliding the small rider until the pointer is straight 4.. Add the amounts of each beam to find the total mass to the nearest tenth of a gram( used only to measure the mass of an solid).

Measuring mass out of a substance procedure

It is necessary to use this procedure to obtain an exact amount of a solid chemical substance. 1. find the mass of the weighing paper or container 2. Add this amount to the desired mass of the chemical and preset the riders to this number. 3. The riders will remain at this amount 4. Then add the chemical to the paper a little at a time until the pointer is balanced at the zero point. 5. record the amount of the weighing paper and the desired mass and add them up.

finding mass by difference

This procedure is most frequently used to find the mass of a liquid in a container. The mass of the empty is subtracted from the combined mass of the container and the liquid.

derived unit

density cannot be observed directly it must be calculated.

m/v

density equals

float

if the density is less than the density of water which is one

sink

if the density of the water is more than one

metric system or international system of units

is a decimal based system used by the rest of the world. (meter, liters.. ect.)

density

is a measure of the amount of matter per unit volume.

mass

is a measurement of how much matter an object contains

matter

is anything in the universe that has mass and takes up space

volume

is the amount of space an object takes up

graduated cylinder

is used to accurately measure the volume of a liquid- object

measuring mass of a substance

it is necessary to use this procedure to obtain an exact amount of a solid chemical substance. Chemicals should never be placed directly on the balance pan, so it is necessary to first find the mass of the weighing paper or container. Add this amount to the desired mass of the chemical and pre-set the riders to this number. The riders will remain at this pre-set value. The chemical is then added to the paper a little at a time until the pointer is balanced at the zero point.

d*v

mass equals

triple beam balance

measures the mass of an object

standard system of measure ment

only the U.S uses it. includes pounds, ounces, ect.

meniscus

the curve at the surface of a liquid is called this

grams per milliliter (g/ml)

the density of a liquid is expressed in this

grams per cubic centimeter (g/cm^3)

the density of a solid is expressed in this

measuring mass directly

the object is placed on the pan of the balance and the riders are moved into position on the beams until the pointer is balanced at the 0 point. The mass is determined by the position of the riders.

liter

the volume of a liquid is commonly measured in this- type of unit

cubic centimeter

the volume of any solid object is expressed in this

Finding mass by difference procedure

this is used to find the mass of a liquid 1. measure the glassware being used 2. Record the mass of the glassware 3. Put the glassware with the liquid inside, on the scale. 4. Record the mass of the glassware 5. Subtract the mass of the two to find the mass of the liquid

measuring volume of a regularly shaped object

this method is used to measure the volume by formula. The volume of any solid object is expressed in cubic meters. Multiply L*W*H

measuring volume directly

this method is used to measure the volume of liquids. A graduated cylinder is used to accurately measure the volume of a liquid. The volume of a liquid is most commonly measured in (liters) or milliliters(ml). The surface of a liquid in any container is curved. The curve at the surface of a liquid is called the meniscus.

water displacement method

this method is used to measure the volume of solid objects with irregular shapes. To find the volume of a small irregular objects, a graduated cylinder. To find the volume of irregular objects,too large to fit in a graduated cylinder, a overflow can is used.

gram

used for mass. Mass is measured in this unit

overflow can

used to find the volume of large, irregularly shaped solid objects, through water displacement.- its an object

m/d

volume equals