Grade 9 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 4
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-14RE3UL-4QJ5
What molecule stores hereditary information?A. Change in inherited population traits over generations B. Growth, repair, and asexual cell reproduction C. DNA D. Mitochondria
What is the role of enzymes?A. They speed reactions by lowering activation energy B. Change in inherited population traits over generations C. Growth, repair, and asexual cell reproduction D. Organisms interacting with each other and their environment
What does a dominant allele do in a heterozygote?A. It is expressed in the phenotype B. Change in inherited population traits over generations C. Net movement from higher to lower concentration D. They speed reactions by lowering activation energy
What is mitosis used for?A. It is expressed in the phenotype B. Change in inherited population traits over generations C. They speed reactions by lowering activation energy D. Growth, repair, and asexual cell reproduction
What organelle produces most cellular ATP?A. Organisms interacting with each other and their environment B. It is expressed in the phenotype C. They speed reactions by lowering activation energy D. Mitochondria
What is diffusion?A. Mitochondria B. Organisms interacting with each other and their environment C. Growth, repair, and asexual cell reproduction D. Net movement from higher to lower concentration
What is evolution?A. They speed reactions by lowering activation energy B. It is expressed in the phenotype C. DNA D. Change in inherited population traits over generations
What is an ecosystem?A. Organisms interacting with each other and their environment B. DNA C. Mitochondria D. Change in inherited population traits over generations
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 4
- What molecule stores hereditary information?DNA
- What is the role of enzymes?They speed reactions by lowering activation energy
- 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 diffusion?Net movement from higher to lower concentration
- What is evolution?Change in inherited population traits over generations
- What is an ecosystem?Organisms interacting with each other and their environment
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.