Science - Chapter 2 Section 1
What is the base unit to measure gravity?
Newtowns (N)
The volume of solid objects is commonly expressed in _____ units.
cubic
On Earth, a Newton equals how many grams?
1 N = 100 g. 2 N = 200 g 20 N = 2,000 g or 2 kg 10 N = 1 kg
What two things determine the weight of objects?
1) mass of the objects 2) location and distance
What characteristic do a human, hot soup, the metal wires in a toaster, and the glowing gases in a neon sign have in common?
They are all made up of matter.
One newton is equal to the weight of an object that has
a mass of 100 g on Earth
What is volume?
a measure of the size of a body or region in three-dimensional space
Liquid Volume
Measured in units of (L) Liters (which is the base unit); mL (milliliters); and (kL) kiloliters
What is matter?
Anything that has mass and takes up space.
Matter
Anything that has mass and takes up space. The amount of space taken up or occupied is know as the object's volume. Everything has matter.
Measuring Mass and Weight
As mass increases, the weight will increase.
Why can you express the volume of the gold nugget measured by this water displacement method in cubic units?
Because 1 mL = 1 cm³
Why is it harder to get a cart full of potatoes moving than one that is empty?
Because a cart full of potatoes has a larger mass than the empty cart.
What is the only way to change the mass of an object?
By changing the amount of matter that makes up the object.
Volume of Irregular Solid Objects
For example, use the water displacement project. 1 mL equals 1 cm³
How does mass affect the inertia of an object?
Large mass is harder to start or stop and a small mass is easier to start or stop.
What three dimensions are needed to find the volume of a rectangular sold?
Length x Width x Height
___ is a measure of the amount of matter in the object.
Mass
____ is always constant no matter where the object is located
Mass
____ is expressed in grams (g), kilograms (kg), or milligrams (mg)
Mass
Mass located in the Universe
Mass is always constant for an object no matter where the object is located in the universe.
What is the difference between Mass and Weight?
Mass is the amount of matter in an object and will NOT change. Weight is the measure of gravity and CAN change.
Volume
The amount of space taken up by an object.
Inertia
The tendency for an object to resist change in motion - objects sit still until something moves - objects stay in motion until something stops it
Measuring Volume of Liquids
Use a graduated cylinder which measured (mL) millimeters. The liquid will have a curved surface known as the meniscus. Read the bottom of the curve for the measurment.
How is weight measured?
Using a spring scale. Measured in Newtons (N)
How could the volume (expressed in cubic units) of a gold nugget be found using water and a graduated cylinder?
Using the water displacement project = By putting the gold nugget into the water of a graduated cylinder the nugget will cause the water to rise. The amount the water rises (displaced by the object) is equal to the objects volume. Lets say that the nugget displaces 15 mL of water. Since 1 mL = 1 cm³, the volume of the nugget is 15 cm³
Volume of Regular Solid Objects
Volume = l x w x h (length x width x height). Measure from one corner
___ is expressed in newtons (N).
Weight
___ is less on the moon than on Earth.
Weight
____ is a measure of the gravitational force on an object.
Weight
____ is measured using a spring scale.
Weight
Weight located in the universe
Weight varies depending on where the object is in relation to the Earth (or any large body in the universe)
The tendency of an object to resist a change in motion is known as?
inertia
The SI unit of mass is the
kilogram (kg)
Mass: Measure of Inertia
large mass - large inertia small mass - small inertia large inertia - harder to start or stop small inertia - easier to start or stop
What unit would be used to measure the amount of water in a lake?
liters (L)
The amount of matter in an object is its
mass
To measure a volume of water in a graduated cylinder, you should look at the bottom of the curve at the surface of the water called the ______.
meniscus
What unit would be used to measure the volume of soda in a can?
milliliters (mL)
The SI unit of wight is the
newton (N)
Mass
the amount of matter in an object which will NOT change. (kg) kilograms is the base unit → (g) grams → (mg) milligrams.
How is mass measured?
using a balance
Things with _____ cannot share the same space at the same time.
volume