Grade 9 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 18
Grade 9 science practice based on published U.S. learning expectations, with reproducible original variations. This printable version includes 8 grade-appropriate questions and a separate answer sheet.
Science Concepts and Evidence
Grade 9 · Stretch challenge · 8 questions · Version PG-126M95E-4QJ5
What does a dominant allele do in a heterozygote?A. DNA B. They speed reactions by lowering activation energy C. It is expressed in the phenotype D. Mitochondria
What is mitosis used for?A. It is expressed in the phenotype B. Organisms interacting with each other and their environment C. Growth, repair, and asexual cell reproduction D. Change in inherited population traits over generations
What organelle produces most cellular ATP?A. It is expressed in the phenotype B. Organisms interacting with each other and their environment C. DNA D. Mitochondria
What is the role of enzymes?A. Change in inherited population traits over generations B. They speed reactions by lowering activation energy C. Net movement from higher to lower concentration D. DNA
What molecule stores hereditary information?A. Change in inherited population traits over generations B. DNA C. It is expressed in the phenotype D. Organisms interacting with each other and their environment
What is evolution?A. It is expressed in the phenotype B. Organisms interacting with each other and their environment C. Net movement from higher to lower concentration D. Change in inherited population traits over generations
What is an ecosystem?A. Mitochondria B. Net movement from higher to lower concentration C. Change in inherited population traits over generations D. Organisms interacting with each other and their environment
What is diffusion?A. Net movement from higher to lower concentration B. It is expressed in the phenotype C. DNA D. Mitochondria
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 18
- What does a dominant allele do in a heterozygote?It is expressed in the phenotype
- What is mitosis used for?Growth, repair, and asexual cell reproduction
- What organelle produces most cellular ATP?Mitochondria
- What is the role of enzymes?They speed reactions by lowering activation energy
- What molecule stores hereditary information?DNA
- What is evolution?Change in inherited population traits over generations
- What is an ecosystem?Organisms interacting with each other and their environment
- What is diffusion?Net movement from higher to lower concentration
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.