Science Pass Review

Josey is conducting a lab investigating the effects of acid rain. While reading the lab instructions, she notices the safety symbol shown above. What is the meaning of this safety symbol?

• Wear safety gloves while performing this experiment.

• Caution: Chemicals in this lab are corrosive.

• Wash your hands after handling the chemicals in this lab.

• Caution: Chemicals in the experiment will be very hot.

Tags

NGSS.MS-PS1-2

Scientists perform many trials for each experiment because —

• they want to improve their public image

• they want to improve the reliability of the results

• they have to rewrite the hypothesis

• they have to decide how to publish the data

Tags

NGSS.MS-LS1-5

This is the periodic entry for the element Boron. What is the atomic mass of Boron?

• 5

• 10.81

• 13

• 15.81

Which of these parts of an atom has a negative charge?

• electron

• proton

• neutron

• nucleus

Design an experiment to test the effect of sunlight on the rate of photosynthesis in a plant. What would be your control variable?

• The type of plant used

• The amount of water given to the plant

• The amount of sunlight each plant receives

• The temperature of the environment

Tags

DOK Level 3: Strategic Thinking

How would you use the scientific method to determine the relationship between the mass of an object and its acceleration due to gravity?

• Calculate the force on different masses and measure the acceleration

• Drop objects of different masses from the same height and time their descent

• Increase the mass of an object while keeping the force constant

• Keep the mass constant and vary the force applied

Tags

DOK Level 3: Strategic Thinking

Which part of the atom has a positive charge?

• electron

• proton

• neutron

• nucleus

Where are electrons found in an atom?

• inside protons

• in the nucleus

• orbiting the nucleus

• covering the surface of protons

The Law of Conservation of Mass states-

• That in order to conserve mass we should always recycle our waste.

• That conservation efforts are the only way to preserve the mass that exists in natural habitats.

• That the mass in chemical reactions can not be created nor destroyed, just rearranged.

• That you should use only the minimum amount of chemicals necessary in a chemical reaction in order to conserve your supply of that chemical.

Tags

NGSS.MS-PS1-5

A student drops a beaker on the floor, breaking it. Which of the following should the student do FIRST?

• Tell the teacher about the accident.

• Find a new beaker to use.

• Look for a broom and dustpan.

• Have your lab partner clean it up for you.