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Science Concepts and Evidence

Grade 10 · Stretch challenge · 8 questions · Version PG-10VBOTH-19D7

1.

What happens to reaction rate when temperature usually rises?A. Ionic bond B. Covalent bond C. Protons D. It increases

2.

What does an atomic number count?A. It increases B. 6.022 x 10^23 particles C. Protons D. Atoms of each element

3.

What type of bond shares electrons?A. Protons B. Ionic bond C. It increases D. Covalent bond

4.

What type of bond transfers electrons?A. Covalent bond B. Protons C. Ionic bond D. It increases

5.

What is an isotope?A. Ionic bond B. Protons C. It increases D. Atoms of one element with different neutron counts

6.

What must a balanced chemical equation conserve?A. Atoms of each element B. 6.022 x 10^23 particles C. Protons D. Ionic bond

7.

What is a mole?A. Ionic bond B. It increases C. 6.022 x 10^23 particles D. Protons

8.

What does pH below 7 indicate?A. Ionic bond B. Covalent bond C. An acidic solution D. It increases

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 8
  1. What happens to reaction rate when temperature usually rises?It increases
  2. What does an atomic number count?Protons
  3. What type of bond shares electrons?Covalent bond
  4. What type of bond transfers electrons?Ionic bond
  5. What is an isotope?Atoms of one element with different neutron counts
  6. What must a balanced chemical equation conserve?Atoms of each element
  7. What is a mole?6.022 x 10^23 particles
  8. What does pH below 7 indicate?An acidic solution

Worked example

Read the direction, identify the assessed skill, solve or cite evidence, and check the response.

Common mistake

Using a memorized procedure without checking what the question asks.

Helpful hint

Name the standard skill before answering.