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WorksheetsOpenSciEd
Total questions: 15
Worksheet time: 15mins
A teacher poured 3 liquids into a glass. Then the teacher added 3 objects to the glass. The diagram shows where each substance stopped. Which liquid is most likely corn syrup?
Liquid Z because corn syrup is more dense than water
Liquid Y because corn syrup is more dense than water
Liquid Y because corn syrup is less dense than water and more dense than a sponge
Liquid Z because corn syrup is less dense than water
A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose as shown. Calculate the density of the rock in g/mL. The density of the rock is (a)
14 g/mL
30 g/mL
70 g/mL
5 g/mL
Benjamin is conducting an experiment in his science class. What property describes how easily the materials he is testing can catch fire?
Solubility
Density
Flammability
Viscosity
During a science experiment, Nora observed the curve at the surface of a liquid in a graduated cylinder. What is this curve called?
Meniscus
Atom
Molecule
Reactant
Hannah and Grace are in a science class learning about chemistry. What do you call a group of two or more atoms bonded together?
Meniscus
Chemical Reaction
Molecule
Phase Change
Kai is conducting an experiment in the lab where he mixes vinegar and baking soda. What is the process called where these substances change into different substances with new properties?
Chemical Reaction
Phase Change
Odor
Product
What is this in molecular formula?
3water
3H₂O
H3O3
3O6H
Which model of matter is most likely a liquid?
A
B
C
Which thing in this picture represents a gas?
ice cubes
bubbles
soda
The substances at the beginning of a chemical equation (to the left of the arrow) are called the ____
product
yield
chemical symbol
reactants
Iron rusts
Physical Change
Chemical Change
How can you cause a chemical reaction in bread dough?
stir it
heat it
cool it
freeze it
OpenSciEd is a curriculum designed to improve science education. Which of the following best describes the primary goal of OpenSciEd?
To provide free access to science textbooks
To enhance student engagement through hands-on experiments
To replace traditional science teachers with online modules
To focus solely on theoretical knowledge
In an OpenSciEd unit, students are asked to investigate the phenomenon of photosynthesis. Which of the following is the correct equation for photosynthesis?
@@6CO_2 + 6H_2O + light ightarrow C_6H_{12}O_6 + 6O_2@@
@@C_6H_{12}O_6 + 6O_2 ightarrow 6CO_2 + 6H_2O + energy@@
@@2H_2 + O_2 ightarrow 2H_2O@@
@@N_2 + 3H_2 ightarrow 2NH_3@@
During an OpenSciEd experiment, students measure the temperature change when mixing two chemicals. What type of reaction is it if the temperature of the solution increases?
Endothermic
Exothermic
Neutralization
Decomposition
