Biology Module 2

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Match the term with the definition Mixture

A combination of substances without a chemical reaction

Match the term with the definition Smelt

A method of separating mixtures that depends on difference in melting points

Match the term with the definition Filtration

A method of separating mixtures that removes solids from liquids

Match the term with the definition Heterogenous

A mixture in which all of the particles are NOT evenly distributed

Match the term with the definition. Homogeneous

A mixture in which all of the particles are evenly distributed throughout the mixture

Match the term with the definition Evaporation

A phase change and a method of separating mixtures

Match the term with the definition Gas

A phase of matter in which there is NOT defined shape or volume

Match the term with the definition Solid

A phase of matter in which there is both defined shape and volume

Match the term with the definition. Liquid

A phase of matter with defined volume but NOT shape

Match the term with the definition Element

A pure substance; a material defined by the number of protons it possesses

The smallest particle of an element that still retains the characteristics of the element is called what?

Atom

The change happening to the egg in this picture is a ___________ change.

Chemical

The change happening while the cake in this picture is baking is a ___________ change.

Chemical

The rusting in this picture is a ___________ change.

Chemical

The stream of vinegar and baking soda mixture that is propelling the rocket in this picture is a ___________ change.

Chemical

___________ are combinations of two or more elements that have been combined chemically.

Compounds

What is the formula for density?

Density = Mass/volume

If you have two liquids with two different boiling points, which separation method would you use?

Distillation

A pure substance that cannot be broken down any further using physical or chemical methods is called what?

Element

Which separation method would you use to collect sea salt from the ocean?

Evaporation

Color is an ___________ property.

Intensive

Density is an ___________ property.

Intensive

Density is what kind of property?

Intensive

Temperature is an ___________ property.

Intensive

___________ have a varying composition and can be separated by physical means.

Mixtures

Look at the melting ice in this picture. This is a ___________ change.

Physical

Melting point is a ___________ property.

Physical

The change happening to the onions in this picture is a ___________ change.

Physical

The change involving the paper in this picture is ___________.

Physical

This picture shows the sublimation of dry ice. This change is ___________.

Physical

Volume is a ___________ property.

Physical

Which separation method would you use to purify gold?

Smelting

Match the term with the definition. Matter

Something that has mass and takes up space and volume

Which one of the following is NOT one of the four phases of matter?

Space

What is the density of carbon monoxide gas if the mass is 0.234 g and it occupies a measured space of 150 mL?

Your Answer: 0.234g / 150 mL = 0.0016

What is the mass of ethyl alcohol that fills a 250.0-mL graduated cylinder? The density of ethyl alcohol is 0.789 g/mL.

Your Answer: 250.0 mL*0.789g/mL = 197g

Find the mass of 275 mL of benzene if the density is 0.8786 g/mL.

Your Answer: 275 mL * 0.8786 g/mL = 242

The density of silver is 10.5 g/cm3. The mass is 3001 g. What is the volume?

Your Answer: 3001 g /10.5 g/cm^3 = 286 cm^3

A piece of metal with a mass of 31.5g is added to a graduated cylinder to calculate the volume. The water is initially at the 51 mark, and it rises to the 78 mark after the metal is added. What is the density of the metal?

Your Answer: 31.5/27 = 1.2 g/cm^3

Mercury is poured into a graduated cylinder that holds exactly 25.0 mL. The mercury has a mass of 320 g. Calculate the density. (Hint: Mercury is a liquid.)

Your Answer: 320g /25.0mL =12.8g/mL

A block of aluminum has a mass of 42 g and is measured to occupy a volume of 15 mL. Calculate the density.

Your Answer: 42 g / 15 mL = 2.8 g/cm^3

What is the mass of zinc if the density is 7.14 g/cm3 and the measured volume is 25.0 cm3?

Your Answer: 7.14 g/cm^3 * 25.0cm^3 =179 g

What is the density of sulfuric acid if the mass is 73.21 g and the measured volume is 45.0 mL?

Your Answer: 73.21 g / 45.0 mL = 1.63 g/mL

What is matter? Please answer in 1-2 full and complete sentences.

Your Answer: Matter is something with mass. It takes up space and volume.

What is the difference between mass and weight? Please answer in at least 2 full and complete sentences.

Your Answer: The difference between mass and weight is that mass is something that takes up space it does not change whether it is in space or on earth. Weight is dependent on how heavy or light the object is. The weight changes because of gravity.

In a few sentences, compare and contrast extensive and intensive properties. Please use proper grammar and mechanics.

Your Answer: The extensive property is what changes the amount of the substance. An intensive property is the amount of substance present. They are similar because they are both measuring something based on how much something is.

In a few sentences, compare and contrast physical and chemical properties. Please use proper grammar and mechanics.

Your Answer: They are both observable. Chemical properties should involve a chemical reaction to be seen. Physical can be seen by it appearance or state of matter.

Flammability is a ___________ property.

chemical


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