EverlyIvery 8th grade Science GMAs Practice 1

Imagine you're on a magical adventure with Zy, Honysti, and London. You come across a mystical book that reveals the secrets of the universe. It tells you that the 3 states of matter are:

• Solid, Liquid and Gas

• Solid, Hard and Soft

• Vapor, Droplets and Cubes

Answer explanation

The correct answer is 'Solid, Liquid and Gas' as these are the three fundamental states of matter. The other options do not accurately represent the states recognized in science.

Tags

NGSS.MS-PS1-4

Imagine you're in a real-world science class! London and Malachi are observing a beaker of water. What is the process called when this water changes from a liquid to a solid?

Answer explanation

The process of a liquid changing to a solid is called freezing. In this magical world, when the potion solidifies, it undergoes freezing, transforming from its liquid state to a solid form.

Tags

NGSS.MS-PS1-4

Imagine you're a tiny explorer like Zy, diving into the world of elements. What's the smallest particle you can find that still keeps its identity as that element?

• Molecule

• Compound

• Electron

• Atom

Answer explanation

The smallest particle that retains the identity of an element is an atom. Molecules and compounds consist of multiple atoms, while electrons are subatomic particles that do not represent the element itself.

Imagine you're a detective like Honysti, Delajia, and Malachi, trying to solve the mystery of molecules! Which of the following represents a molecule of a compound?

• Ne

• Li

• NaCl

• H

Answer explanation

NaCl represents a molecule of a compound because it consists of two different elements, sodium (Na) and chlorine (Cl), chemically bonded together. In contrast, Ne, Li, and H are all single elements.

Tags

NGSS.MS-PS1-1

Imagine you're a scientist like Delajia, Zy, or Malachi, and you're witnessing a chemical reaction in your lab. What happens during this exciting transformation?

• Reactants magically transform into products

• Products change back into reactants

• Matter mysteriously vanishes

Answer explanation

During a chemical reaction, reactants undergo a transformation to form products. This process is not magical but follows the laws of chemistry, where bonds are broken and formed, resulting in new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Delajia and Malachi are baking cookies, and they need to know how many atoms of hydrogen are in one molecule of glucose to get the perfect sweetness! The chemical formula for glucose is: C₆H₁₂O₆. Can you help them figure it out?

• 6

• 8

• 12

Answer explanation

In the chemical formula for glucose, C₆H₁₂O₆, the subscript '12' next to hydrogen (H) indicates that there are 12 hydrogen atoms in one molecule of glucose. Therefore, the correct answer is 12.

Tags

NGSS.MS-PS1-1

London and Honysti are conducting a science experiment. They want to know which equation upholds the Law of Conservation of Mass by being perfectly balanced, proving that no matter has been created or destroyed. Can you help them figure it out?

• H₂ + O₂ ---> H₂O

• 2H₂ + O₂ ---> 2H₂O

• H₂ + 2O₂ ---> 2H₂O

Answer explanation

The equation 2H₂ + O₂ ---> 2H₂O is balanced with 4 hydrogen and 2 oxygen atoms on both sides, demonstrating the Law of Conservation of Mass. The other equations do not maintain this balance.

Tags

NGSS.MS-PS1-5

London and Honysti are in a science class, and their teacher asks them a fun question: "What is the smallest particle into which a compound can be divided and still be that substance?"

• electron

• proton

• atom

• molecule

Answer explanation

The smallest particle of a compound that retains its chemical properties is an atom. While molecules are made of atoms, they can be further divided into individual atoms, which are the fundamental building blocks of matter.

Malachi and Zy are on a treasure hunt in the Periodic Table! They need to find the element that is in Period 2 and Family Group 17. Can you help them discover which element it is?

• Ca - Calcium

• F - Flourine

• V - Vanadium

Answer explanation

The element in Period 2 and Family Group 17 is Fluorine (F). Calcium (Ca) is in Group 2, and Vanadium (V) is in Group 5, making Fluorine the correct choice for the treasure hunt!

Demarcus and Zy are exploring the fascinating world of chemistry. They stumble upon the Periodic Table of the Elements and wonder, how many groups does it have?

• 4 Periods

• 12 Families

• 18 Groups

Answer explanation

The Periodic Table has 18 groups, also known as families, which are the vertical columns. Each group contains elements with similar properties, making 18 the correct answer.