Lab tools, Metric Independent/Dependent/control/Constant

Which of the following describes the difference between an observation and an inference?

• An observation is an opinion and an inference is a fact.

• Both are facts. An inference just takes longer to explain.

• Observation is a true fact based on our five senses. Inference is a possible explanation or an opinion.

• Both are an opinion based on your point of view

If I were to say for an observation that a dog has 2 frog legs hanging out of his mouth. What type of an observation is this?

• The statement is an opinion

• the statement is an inference

• This statement is a qualitative observation.

• This statement is a quantitative observation.

Observations that are made using your senses and are NOT measurable (like colors and smells) are called ______________________ observations.

• Quantitative

• Qualitative

• controlled

• opinion

"Albert Einstein is the most intelligent man in the world." This statement is a(n):

• Opinion

• Qualitative

• Quantitative

• Prediction

Which of the following is a safety violation (breaking a safety rule)?

• keeping your lab table clean

• Wearing Googles

• Pulling back hair

• Using broken glassware in the lab

You are working with a small lab group when someone spills an unknown chemical on the lab table. What should you do first?

• Wipe the spill up with a paper towel.

• Tell the Teacher

• Continue working

• just leave it and go to another lab station

Which of these can be observed in the picture above?

• The ball is deflated

• The ball is circular (round)

• The ball is solid like a rock

• The ball can be thrown a long distance

Alissa wants to do a laboratory investigation to find how long it takes a rat to reach the end of a maze. She puts food at the end of a maze. What tool will she need to use during her investigation to see how long it takes for the rat to reach the end of the maze.

• Meter stick

• graduated cylinder

• triple beam balance

• Stop Watch

How would you measure the volume of a rock using a graduated cylinder?

• Place the rock into the graduated cylinder, then record the amount

• Place the rock into the graduated cylinder, then mass them on the triple beam balance.

• Measure the water level both before and after you place the rock in the graduated cylinder. Subtract the two numbers to get the rock's volume.

• Put water in the graduated cylinder until it covers the rock, then record the amount

What equipment would you use to measure milliliters of water for an experiment?

• Graduated cylinder

• Triple beam balance

• Stop Watch

• Flask