First Test Review!

Before starting an experiment, you should try an experiment on your own open all containers and packages read all directions and make sure you understand them handle all the equipment to become familiar with it 30

Matter is made up of particles too small to be seen by the human eye Matter is made up of particles too small to be seen by the human eye. What are these particles? Atoms Compounds Mixtures oxygen 30

What variable should come after the “then” in an hypothesis? Constant Dependent Independent Measurable 30

If you get hurt or injured in any way, you should tell your teacher immediately find bandages or first aid kit go to the principals office get help after you finish the lab 30

When I enter the science lab, I will begin my experiment play with equipment wait for the teacher to give instructions read the instructions myself and get started 30

The electron cloud is Much smaller than the atom’s nucleus Much larger than the atom’s nucleus About the same size as the atom’s nucleus Always changing size 30

Identify the lab equipment. scale Graduated cylinder ruler triple beam balance 30

What should you do when you have completed your laboratory activity? sit and talk to your lab partner leave your area messy wash your hands thoroughly clean up your area 30

What unit of measurement would you use with this tool? meter liter gram yard 30

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What SI unit do we use for mass? pounds inches Kelvin grams 30

Elements in the periodic table are arranged by How they react with metals Half-life and atomic mass Properties and atomic number The number of neutrons and ions 30

How long is the crayon? 71 cm 7.1 cm 7.0 m 7.0 cm 30

How much mass does the object have? 35 g 330.5 g 335 g 3305 g 30

How much liquid is in the graduated cylinder? 76 mL 70.3 mL 73 mL 74 mL 30

What are neutrons? Uncharged particles in an atom’s nucleus Negatively charged particles in an atom’s nucleus Uncharged particles that form a cloud around an atom’s nucleus Charged particles that form a cloud around an atom’s nucleus 30

Identify the lab equipment. beaker Graduated cylinder Erlenmeyer flask funnel 30

Which of these tools would be used to find the length of the football field? graduated cylinder meter stick triple beam balance thermometer 30

In an experiment, the variable that is being tested is the? dependent variable responding variable independent variable constant variable 30

The nucleus of the atom contains Protons, neutrons and electrons Only electrons Protons and neutrons Electrons and protons 30

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In solving a problem by a scientific investigation, which of the following would be the best first step? 1. Design an experimental procedure. 2. Define the problem by asking questions. 3. Come to a conclusion based on your existing knowledge. 4. Form a larger group and vote on the answer. 30

For his science fair project, Nigel wants to examine how different surfaces affect the speed of his skateboard. Is this a testable question? Yes No 30

An atom consists of Metals, nonmetals, and metalloids Electrons, protons, and neutrons Elements, compounds, and molecules Products, reactants, and catalysts 30

speed different surfaces the skateboard time For his science fair project, Nigel wants to examine how different surfaces affect the speed of his skateboard. His hypothesis is that if the type of surface the skateboard is moving on is smoother, then the skateboard will increase speed because there would be less friction. What is the independent variable in Nigel’s experiment? speed different surfaces the skateboard time 30

speed different surfaces the skateboard time For his science fair project, Nigel wants to examine how different surfaces affect the speed of his skateboard. His hypothesis is that if the type of surface the skateboard is moving on is smoother, then the skateboard will increase speed because there would be less friction. What is the dependent variable in Nigel’s experiment? speed different surfaces the skateboard time 30

A substance made of only one type of atom is a(n) Element Compound Mixture Molecule 30

An ion is an atom with More than one proton More than one nucleus No electrical charge An overall electrical charge 30

What variable should come after the “If” in an hypothesis? Constant Dependent Independent Measurable 30

The atomic number of an element tells you the atom’s Mass Number of neutrons Weight Number of protons 30

What phrase describes an hypothesis? a theory explaining the topic an opinion about an investigation a fact based on available evidence an educated guess that is testable 30

The positively charged particles in an atom are Electrons Neutrons Nuclei Protons 30

Worms are eating Rose's pea plants Worms are eating Rose's pea plants. She wants to test some household chemicals to see if they will kill the worms. What is the best testable question for Rose to ask? 1. Are earthworms or inchworms hardest to kill? 2. What amount of soapsuds best kills worms? 3. Will worms eat soapsuds? 4. How are soapsuds best spread over a garden? 30

Which skill are you using when you use your five senses to gather information? posing questions observing developing hypotheses designing experiments 30

Which question would be answered with an opinion rather than scientifically? 1. What is the speed of a running cougar? 2. How fast does a mouse grow? 3. What is the heart rate of a shark? 4. Which cat has the most attractive coat? 30

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3. amount of stain left on the cloth 4. scrubbing time for each cloth John wanted to find out which laundry soap was best for removing grass stains. Each soap was mixed with warm water. It was then used to scrub a piece of grass-stained cloth for 1 minute. Then the amount of stain left on the cloth was measured. What is the independent variable? 1. water temperature 2. laundry soap 3. amount of stain left on the cloth 4. scrubbing time for each cloth 30

amount of stain left on the cloth scrubbing time for each cloth John wanted to find out which laundry soap was best for removing grass stains. Each soap was mixed with warm water. It was then used to scrub a piece of grass-stained cloth for 1 minute. Then the amount of stain left on the cloth was measured. What is the dependent variable? water temperature laundry soap amount of stain left on the cloth scrubbing time for each cloth 30

What are electrons? Positively charged particles Negatively charged particles Particles with no charge Particles whose charge can change 30

The three basic units are: meter, liter, pounds. True False 30

The total number of protons and neutrons in the nucleus determines the atom’s Symbol Atomic number Atomic mass number size 30

In an experiment, the variable that is being tested is the? dependent variable responding variable independent variable constant variable 30

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